Статті в журналах: "Water sloshing tank"

1

Jin, Heng, Ruiyin Song, and Yi Liu. "Sloshing Motion in a Real-Scale Water Storage Tank under Nonlinear Ground Motion." Water 12, no. 8 (July 24, 2020): 2098. http://dx.doi.org/10.3390/w12082098.

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Water storage tanks in cities are usually large and are occasionally affected by earthquakes. A sudden earthquake can cause pressure pulses that damage water containers severely. In this study, the sloshing motion in a high filling level tank caused by seismic excitation is investigated by the numerical method in a 2D model. Two well-studied strong earthquakes are used to analyze the broadband frequency nonlinear displacement of the tank both in the longitudinal and vertical directions. Based on careful experimental verification, the free surface motion and the elevations at the side wall are captured, and the sloshing pressure response is examined. The results show that the 2D section of the cylindrical tank can be used to estimate the maximum response of the 3D sloshing, and the water motions under the seismic excitations are consistent with the modal characteristics of the sloshing. The time histories response of the water motion reflected that the sloshing response is hysteretic compared with the seismic excitation. The anti-seismic ability of the damping baffle shows that its effect on sloshing pressure suppression is limited, and further study on the seismic design of water tanks in earthquake-prone regions is needed.

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2

Govindrao Mane, Sneha, and Dr S. S. Angalekar. "SEISMIC ANALYSIS OF WATER TANK AT DIFFERENT STOREY HEIGHT OF THE BUILDING AND TO CHECK FLUID SLOSHING EFFECT." International Journal of Engineering Applied Sciences and Technology 7, no. 1 (May 1, 2022): 141–46. http://dx.doi.org/10.33564/ijeast.2022.v07i01.021.

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Sloshing is one of the most dominant effects in elevated water tanks, water storage tanks, and structures. An earthquake is a disruptive disturbance that causes shaking of the earth's surface due to movement along a fault plane or volcanic activity. The nature of the produced forces is reckless and only lasts a brief time. Sloshing thus involves a wide range of engineering difficulties, one of which is the dynamic response of lifeline liquid storage tanks in the event of an earthquake. Aerospace, civil, and nuclear engineers are all concerned about liquid sloshing in moving or stationary containers. DOSIWAM Sewage Treatment Plants serve to reduce negative environmental effect by enhancing effluent quality. The current study is the extension of the "environmental floor" concept, where installing the DOSIWAM system at intermittent levels of a multistoried building is carried out. The water coming out of this tank has very low BOD, so the water becomes suitable for reuse in gardening, irrigation, and firefighting operations. A novel approach was used, combining the CFD software and structural analysis software to check the sloshing effect. This is part of a research effort dedicated to developing a CAE (Computer-Aided Engineering) methodology. The project's objective was to check the effect of the storage tank on the environmental floor. Thus, a storage tank and a water tank with an aspect ratio close to 1 can be safely provided. The difference in time period of the water tank and the structure was found to reduce the effect of sloshing. Hence, the Storage tank of the DOSIWAM system can be safely installed on the structure.

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3

Kotrasová, Kamila. "Vibration Analysis of Simply Supported Rectangular Tank Partially Filled with Water." MATEC Web of Conferences 210 (2018): 04003. http://dx.doi.org/10.1051/matecconf/201821004003.

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Ground-supported tanks are used as fluid storage. One of the phenomena associated with the seismic response of liquid-filled tanks is the fluid motion occurring that causes “sloshing” at the top of free surface. This paper presents the theoretical of fluid response of rectangular tank due to horizontal acceleration of tank bottom, the impulsive and convective (sloshing) pressure and the fluid natural frequencies. The vibration analysis of fluid filled rectangular container was monitored and was evaluated in experiment for purpose to evaluation of the first frequency mode and vibration response of fluid were analysed by using FEM.

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4

YANG, XIUFENG, SHILIU PENG, MOUBIN LIU, and JIARU SHAO. "NUMERICAL SIMULATION OF BALLAST WATER BY SPH METHOD." International Journal of Computational Methods 09, no. 01 (March 2012): 1240002. http://dx.doi.org/10.1142/s0219876212400026.

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Ballast water has frequently been used in ships to provide stability and adjust trim, stress, and torsion for optimal steering and propulsion. Numerical simulation of the movement of ballast water and its interaction with the solid walls of operating ships are very difficult for traditional grid-based numerical models. In this paper, the smoothed particle hydrodynamics (SPH) method is applied to simulate water tank sloshing and the movement of ships carrying ballast water in three cases. Numerical results of water tank sloshing are compared with experimental ones. Numerical results of ships indicate that carrying ballast water in several separated small tanks generally makes a ship more stable, but keeping ballast water in one big tank generally makes a ship more unstable.

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5

Zhang, Qiong, Bo Shui, and Hanhua Zhu. "Study on Sloshing Characteristics in a Liquid Cargo Tank under Combination Excitation." Journal of Marine Science and Engineering 10, no. 8 (August 11, 2022): 1100. http://dx.doi.org/10.3390/jmse10081100.

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Sloshing is a common flow phenomenon in liquid cargo tanks and has a great negative impact on the stability and safety of ship navigation. It is important to understand the sloshing process of tanks under the excitation of complex external conditions for the transportation of liquid cargo. In this paper, the sloshing characteristics of a liquid cargo tank are studied under the combination excitation conditions of roll and surge. The pressure distribution characteristics at different positions of the cargo tank are discussed, along with the influence of different excitation conditions on the pressure of the cargo tank. The results show that under the condition of combination excitation, the fluid sloshes along the diagonal direction of the tank, and the peak liquid height and peak pressure are located on the diagonal corner of the tank. The peak pressure at the lowest point on the diagonal of the tank is proportional to the amplitude of the roll angle and surge, and the change in roll angle amplitude has a significant impact on the pressure and liquid height at different positions.

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6

SAEKI, SOUICHI, HARUKI MADARAME, and KOJI OKAMOTO. "Self-induced sloshing excited by a horizontally injected plane jet." Journal of Fluid Mechanics 448 (November 26, 2001): 81–114. http://dx.doi.org/10.1017/s0022112001004153.

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A self-induced free-surface oscillation termed ‘self-induced sloshing’ was observed in a rectangular tank with a submerged and horizontally injected water jet. Self-induced sloshing is excited by the flow itself without any external force. Its behaviour was examined by experiment. The dominant frequency was found to be close to the first or second eigenvalue of fluid in a tank. The conditions of sloshing excitation were obtained for four tank geometries. They were called the ‘sloshing condition’, and defined in terms of inlet velocity and water level. Sloshing conditions were found to be strongly dependent on inlet velocity and tank geometry. A two-dimensional numerical simulation code was developed to simulate self-induced sloshing. The code was based on the boundary-fitted coordinate (BFC) method with height function. The numerical results were qualitatively verified by the experimental results, and were found to correlate well in terms of flow pattern, free-surface shape and sloshing conditions. In this study, sloshing growth was evaluated quantitatively using the simulation results. Oscillation energy supplied for the sloshing motion during a sloshing period (Econ) was calculated from simulation results. Sloshing growth was found to be strongly related to the sign and magnitude of Econ. The distribution of Econ showed that jet flow had a strong correlation with the sloshing growth. It was clarified that sloshing growth was primarily dependent on the spatial phase state of jet fluctuation. A governing parameter of self-induced sloshing, the modified Strouhal number Sts, was proposed on the basis of numerical evaluations of oscillation energy. The value of Sts suggests that one or two large vortices generated by jet fluctuations exist between the inlet and outlet during a sloshing period. When Sts is approximately either 1 (first stage) or 2 (second stage), self-induced sloshing occurs consistently in all experimental cases. The dependence of sloshing on inlet velocity, water level and tank geometry was revealed using Sts. For several tank geometries, a sloshing mode shift or jet mode (stage) transition was found to occur due to changes in inlet jet velocity. The combination of sloshing mode and jet stage can determine the state of the self-induced sloshing. As a result of this study, we propose a new excitation mechanism of self-induced sloshing, represented by a simple feedback loop closed by sloshing motion and jet fluctuation. The overall physical oscillation mechanism of self-induced sloshing was clarified using this feedback loop.

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7

Tsao, Wen-Huai, Ying-Chuan Chen, Christopher E. Kees, and Lance Manuel. "The Effect of Porous Media on Wave-Induced Sloshing in a Floating Tank." Applied Sciences 12, no. 11 (May 31, 2022): 5587. http://dx.doi.org/10.3390/app12115587.

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Placing porous media in a water tank can change the dynamic characteristics of the sloshing fluid. Its extra damping effect can mitigate sloshing and, thereby, protect the integrity of a liquefied natural gas tank. In addition, the out-of-phase sloshing force enables the water tank to serve as a dynamic vibration absorber for floating structures in the ocean environment. The influence of porous media on wave-induced sloshing fluid in a floating tank and the associated interaction with the substructure in the ambient wave field are the focus of this study. The numerical coupling algorithm includes the potential-based Eulerian–Lagrangian method for fluid simulation and the Newmark time-integration method for rigid-body dynamics. An equivalent mechanical model for the sloshing fluid in a rectangular tank subject to pitch motion is proposed and validated. In this approach, the degrees of freedom modeling of the sloshing fluid can be reduced so the numerical computation is fast and inexpensive. The results of the linear mechanical model and the nonlinear Eulerian–Lagrangian method are correlated. The dynamic interaction between the sloshing fluid and floating body is characterized. The effectiveness of the added porous media in controlling the vibration and mitigating the sloshing response is confirmed through frequency response analysis.

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8

Kotrasová, Kamila. "Elevated Tank Due to Earthquake Even." Transactions of the VŠB – Technical University of Ostrava, Civil Engineering Series. 17, no. 2 (December 1, 2017): 31–36. http://dx.doi.org/10.1515/tvsb-2017-0024.

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Abstract Elevated reservoirs are mainly used for storing of variety water. During earthquake activity the fluid exerts impulsive and convective (sloshing) effects on the walls and bottom of tank. This paper provides theoretical background for analytical calculating of elevated water tank due to earthquake even and deals with simplified seismic design procedures for elevated tanks.

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9

Ren, Lv, Yinjie Zou, Jinbo Tang, Xin Jin, Dengsong Li, and Mingming Liu. "Numerical Modeling of Coupled Surge-Heave Sloshing in a Rectangular Tank with Baffles." Shock and Vibration 2021 (May 31, 2021): 1–11. http://dx.doi.org/10.1155/2021/5545635.

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Liquid sloshing under coupled surge and heave excitations in a rectangular tank has been numerically investigated by applying a Navier–Stokes solver. Fieriest coupled sloshing was further considered, and the internal baffle was expected to suppress the violent sloshing wave. After getting fully validated against available results from the literatures, the numerical model was applied to research coupled sloshing, and both vertical baffle and horizontal baffle have been considered. Due to the strong vortexes created by the sharper corners of the baffles and the reduction of the effective water bulk climbing through the tank walls, the sloshing was dramatically reduced. The increase of the baffle distance away from the tank bottom led to a decrease in the sloshing wave. It was noted that the baffle near the free surface caused the maximal dissipation. The frequency response of the sloshing wave was accordingly illustrated.

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10

Borg, Mitchell G., Claire DeMarco Muscat-Fenech, Tahsin Tezdogan, Tonio Sant, Simon Mizzi, and Yigit Kemal Demirel. "A Numerical Analysis of Dynamic Slosh Dampening Utilising Perforated Partitions in Partially-Filled Rectangular Tanks." Journal of Marine Science and Engineering 10, no. 2 (February 13, 2022): 254. http://dx.doi.org/10.3390/jmse10020254.

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Conventional liquefied natural gas (LNG) cargo vessels are imposed with tank-fill limitations as precautions to prevent structural damage and stability-loss due to high-impact sloshing, enforcing cargo volume-fills to be lower than 10% or higher than 70% of the tank height. The restrictions, however, limit commercial operations, specifically when handling spot trades and offshore loading/unloading at multiple ports along a shipping route. The study puts forward a computational fluid dynamic (CFD) sloshing analysis of partially-filled chamfered rectangular tanks undergoing sinusoidal oscillatory kinetics with the use of the explicit volume-of-fluid and non-iterative time-advancement schemes. Establishing a 20% to 60% fill-range, the sloshing dynamics were acknowledged within an open-bore, partitioned, and perforated-partitioned tank when oscillating at frequencies of 0.5 Hz and 1 Hz. The overall torque and static pressure induced on the tank walls were investigated. High-impact slamming at the tank roof occurred at 40% and 60% fills, however, the implementation of the partition and perforated-partition barriers successfully reduced the impact due to suppression and dissipation of the wave dynamics.

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11

Gao, Song Qiang, Da Kui Feng, Jing Hu, Zhi Guo Zhang, and Gong Xiang. "The Numerical Simulation of 2D Sloshing Tank." Applied Mechanics and Materials 44-47 (December 2010): 1996–2000. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.1996.

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In this study, a two-dimensional numerical method based on the volume of fluid method is used to solve for water sloshing. The 2D equations of fluid motion are derived in a moving coordinate system. For modeling impact pressure induced by large amplitude sloshing, an emphasis is given to the numerical treatment of the free surface, which is sensitive to the simulation. Liquid sloshing inside a rectangular tank is simulated. The time histories of the free surface shape and the dynamic pressure inside the tank are obtained. The results are compared with an experimental data. These comparisons show that this method can be used to simulate the sloshing induced impact loads. Then series of violent sloshing phenomenon is given and compared.

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12

Ju, Young-Kyu. "Structural behaviour of water sloshing damper with embossments subject to random excitation." Canadian Journal of Civil Engineering 31, no. 1 (January 1, 2004): 120–32. http://dx.doi.org/10.1139/l03-082.

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To improve the serviceability of tall buildings, several types of vibration control systems have been developed. The tuned liquid damper (TLD) has advantages, such as simple adjustment of natural frequency, easy installation, and low maintenance. Since water tanks at the top of tall buildings can be directly modeled as a TLD system, it is more practical than any other vibration control system in Korea. Since most of the tanks in Korea have embossments on the wall, the structural characteristics are different from those of tanks used in other countries. As the damping ratio of the TLD depends on several factors, such as the magnitude and frequency of applied load, the shape of the tank, wall roughness, and so forth, it is difficult to evaluate the control performance of the tank exactly. In this study, the characteristics of the water sloshing damper with embossments (WSDE) are evaluated and the equation for equivalent damping ratio is proposed. To clarify the damping effect of a high-rise building with a damping device subject to random excitation, an experiment of a coupled structural model with a water tank was conducted. The parameters were mass ratio of water to model structure, number of wire screens, and shape factor of the water tank. The peak displacement, acceleration response, and standard deviation of the experimental results are analyzed. The coupled structural model with a water tank shows lower maximum and standard deviation responses than those of the structural model alone.Key words: water sloshing damper with embossment, vibration control, structural test, tall buildings.

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13

Lu, Daogang, Xiaojia Zeng, Junjie Dang, and Yu Liu. "A Calculation Method for the Sloshing Impact Pressure Imposed on the Roof of a Passive Water Storage Tank of AP1000." Science and Technology of Nuclear Installations 2016 (2016): 1–8. http://dx.doi.org/10.1155/2016/1613989.

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There is a large water storage tank installed at the top of containment of AP1000, which can supply the passive cooling. In the extreme condition, sloshing of the free surface in the tank may impact on the roof under long-period earthquake. For the safety assessment of structure, it is necessary to calculate the impact pressure caused by water sloshing. Since the behavior of sloshing impacted on the roof is involved into a strong nonlinear phenomenon, it is a little difficult to calculate such pressure by theoretical or numerical method currently. But it is applicable to calculate the height of sloshing in a tank without roof. In the present paper, a simplified method was proposed to calculate the impact pressure using the sloshing wave height, in which we first marked the position of the height of roof, then produced sloshing in the tank without roof and recorded the maximum wave height, and finally regarded approximately the difference between maximum wave height and roof height as the impact pressure head. We also designed an experiment to verify this method. The experimental result showed that this method overpredicted the impact pressure with a certain error of no more than 35%. By the experiment, we conclude that this method is conservative and applicable for the engineering design.

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14

Al-Yacouby, Ahmad Mahamad, and Mostafa Mohamed Ahmed. "A Numerical Study on the Effects of Perforated and Imperforate Baffles on the Sloshing Pressure of a Rectangular Tank." Journal of Marine Science and Engineering 10, no. 10 (September 20, 2022): 1335. http://dx.doi.org/10.3390/jmse10101335.

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Sloshing has many industry applications, namely in offshore engineering, aerospace, ship building, and manufacturing. Sloshing simulation is essential to better understand the sloshing pattern and consequently to improve the tank design to reduce noise levels, stresses on the structure, and optimize the baffle configurations and arrangements. Thus, the aim of this study is to determine the effects of perforated (porous) and imperforate (solid) baffles on the sloshing pressure using ANSYS FLUENT software based on Volume of Fluid (VOF) method where a rectangular tank with 25% and 60% filling ratios was considered. In the first case, an unbaffled rectangular tank with 60% filling ratio was used for the validation purpose, while in the second case, a 25% filling ratio was investigated considering two scenarios, namely a unbaffled tank and a baffled tank case with perforated and imperforate baffles. The outcomes of the results indicate that perforated baffle can significantly reduce the sloshing pressure in the tank. The validation of the results also shows a good agreement with the published experimental results.

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15

Li, Xiaojun, Chenning Song, Guoliang Zhou, Chao Wei, and Ming Lu. "Experimental and Numerical Studies on Sloshing Dynamics of PCS Water Tank of Nuclear Island Building." Science and Technology of Nuclear Installations 2018 (2018): 1–13. http://dx.doi.org/10.1155/2018/5094810.

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Water tank is one important component of passive containment cooling system (PCS) of nuclear island building. The sloshing frequency of water is much less than structure frequency and large-amplitude sloshing occurs easily when subjected to seismic loadings. Therefore, the sloshing dynamics and fluid-structure interaction (FSI) effect of water tank should be considered when the dynamic response of nuclear island building is analyzed. A 1/16 scaled model was designed and the shaking table test was done, in which the hydrodynamic pressure time histories and attenuation data of wave height were recorded. Then the sloshing frequencies and 1st sloshing damping ratio were recognized. Moreover, modal analysis and time history analysis of numerical model were done by ADINA software. By comparing the sloshing frequencies and hydrodynamic pressures, it is proved that the test method is reasonable and the formulation of potential-based fluid elements (PBFE) can be used to simulate FSI effect of nuclear island building.

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16

Yuan, Xinyi, Yan Su, and Peng Xie. "Frequency Characteristics of Sloshing Resonance in a Three-Dimensional Shallow-Water Rectangular Tank." Journal of Marine Science and Engineering 10, no. 11 (November 21, 2022): 1792. http://dx.doi.org/10.3390/jmse10111792.

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The frequency characteristics of free surface elevation time histories of shallow-water sloshing in a three-dimensional rectangular tank is presented. The numerical model for sloshing motion uses an accurate velocity potential Boussinesq-type equation. A particular solution is adopted to express the external excitations and a linear damping term is introduced to replace a friction effect produced by tank walls. The excitation amplitude of the forced movement of the tank is tiny, while the excitation frequency varies around the first resonance frequency. The numerical results show that the wave energy in the rectangular tank under resonance is concentrated in the integer multiple of excitation frequencies, the sum excitation frequencies, and the difference excitation frequencies.

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17

Vaziri, Nima, and Ming Jyh Chern. "Base Aspect Ratio Effects on Resonant Fluid Sloshing in a Rectangular Tank." Applied Mechanics and Materials 836 (June 2016): 60–66. http://dx.doi.org/10.4028/www.scientific.net/amm.836.60.

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A PSME model is used to study the base aspect ratio effect on resonant fluid sloshing in a 3D tank. Three different depth classes (shallow water, intermediate depth and finite depth) and three base aspect ratios (very long base, half width base and square base) are considered. Longitudinal and diagonal excitations are applied to all cases. Results show that sloshing in lower depth tank strongly depends on the base aspect ratio. Keywords: PSME method; Nonlinear sloshing waves; Base aspect ratio effect.

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18

Tao, Kaidong, Xueqian Zhou, and Huiolong Ren. "A Novel Improved Coupled Dynamic Solid Boundary Treatment for 2D Fluid Sloshing Simulation." Journal of Marine Science and Engineering 9, no. 12 (December 7, 2021): 1395. http://dx.doi.org/10.3390/jmse9121395.

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In order to achieve stable and accurate sloshing simulations with complex geometries using Smoothed Particle Hydrodynamic (SPH) method, a novel improved coupled dynamic solid boundary treatment (SBT) is proposed in this study. Comparing with the previous SBT algorithms, the new SBT algorithm not only can reduce numerical dissipation, but also can greatly improve the ability to prevent fluid particles penetration and to expand the application to model unidirectional deformable boundary. Besides the new SBT algorithm, a number of modified algorithms for correcting density field and position shifting are applied to the new SPH scheme for improving numerical stability and minimizing numerical dissipation in sloshing simulations. Numerical results for three sloshing cases in tanks with different geometries are investigated in this study. In the analysis of the wave elevation and the pressure on the tank, the SPH simulation with the new SBT algorithm shows a good agreement with the experiment and the simulations using the commercial code STAR-CCM+. Especially, the sloshing case in the tank with deformable bottom demonstrates the robustness of the new boundary method.

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19

Heo, Dongpil, and Sehong Min. "A Study on the Structural Analysis for Sloshing Prevention through Binding between FRP Firefighting Water Tank Members." Journal of the Korean Society of Hazard Mitigation 22, no. 2 (April 30, 2022): 91–100. http://dx.doi.org/10.9798/kosham.2022.22.2.91.

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The seismic safety of a fire extinguishing water tank must be verified because of the revision of the seismic design standard of fire protection systems. Although, the FRP water tank has weak physical properties, it is often used as a fire extinguishing water tank, confronting the reality that there is no way of checking its structural safety. This study focuses on a reliable structural analysis by extracting and accumulating data on the physical and chemical characteristics of FRP through the National Certification Testing Agency to ensure the structural safety of an FRP water tank. It has been found that sloshing causes the breakage of a water tank and the fluid movement in the lower part of a water tank can be reduced not by using the external reinforcement method but by improving the internal structure through binding of the water tank members. This method can be employed for reinforcing the seismic safety of an FRP water tank with weak physical properties. Accordingly, a water tank with a structure that prevents sloshing caused by an earthquake has been developed. The improvement in the seismic safety of the developed fire extinguishing water tank has been verified through a Solidworks simulation analysis. Therefore, the proposed strategy for the improvement of the seismic safety of a fire extinguishing water tank can be employed as the basic study material for using an FRP water tank with weak physical properties as the seismic fire extinguishing water tank.

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20

Doi, Taiga, Takashi Futatsugi, Michio Murase, Kosuke Hayashi, Shigeo Hosokawa, and Akio Tomiyama. "Countercurrent Flow Limitation at the Junction between the Surge Line and the Pressurizer of a PWR." Science and Technology of Nuclear Installations 2012 (2012): 1–10. http://dx.doi.org/10.1155/2012/754724.

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An experimental study on countercurrent flow limitation (CCFL) in vertical pipes is carried out. Effects of upper tank geometry and water levels in the upper and lower tanks on CCFL characteristics are investigated for air-water two-phase flows at room temperature and atmospheric pressure. The following conclusions are obtained: (1) CCFL characteristics for different pipe diameters are well correlated using the Kutateladze number if the tank geometry and the water levels are the same; (2) CCFL occurs at the junction between the pipe and the upper tank both for the rectangular and cylindrical tanks, and CCFL with the cylindrical tank occurs not only at the junction but also inside the pipe at high gas flow rates and small pipe diameters; (3) the flow rate of water entering into the vertical pipe at the junction to the rectangular upper tank is lower than that to the cylindrical tank because of the presence of low frequency first-mode sloshing in the rectangular tank; (4) increases in the water level in the upper tank and in the air volume in the lower tank increase water penetration into the pipe, and therefore, they mitigate the flow limitation.

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21

SONE, Ryuta, Ryo SHIONOYA, Tsuyoshi IDA, Hirokazu HIRANO, and Naotsugu SATO. "COUNTERMEASURES FOR SQUARE WATER TANK AGAINST SLOSHING PHENOMENON." Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering ^|^ Earthquake Engineering (SE/EE)) 70, no. 4 (2014): I_1118—I_1123. http://dx.doi.org/10.2208/jscejseee.70.i_1118.

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You, Ki Pyo, Young Moon Kim, Cheol Min Yang, and Dong Pyo Hong. "Increasing Damping Ratios in a Tuned Liquid Damper Using Damping Bars." Key Engineering Materials 353-358 (September 2007): 2652–55. http://dx.doi.org/10.4028/www.scientific.net/kem.353-358.2652.

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Wind-induced vibration of tall buildings have been of interest in engineering for a long time. Wind-induced vibration of a tall building can be most effectively controlled by using passive control devices. The tuned liquid damper(TLD) is kind of a passive mechanical damper, which relies on the sloshing liquid in a rigid tank. TLD has been successfully employed in practical mitigation of undesirable structural vibrations because it has several potential advantages: low costs, easy installation in existing structures, and effectiveness even against small-amplitude vibrations. Shaking table experiments were conducted to investigate the characteristics of the shallow water sloshing motion in a rectangular tank. To increase the damping ratio of the rectangular water tank, triangle sticks were installed at the bottom of water tank. This installation increased the damping ratio by amaximum of 40-70%.

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23

Murata, Kouichi, and Masakatsu MIYAIMA. "INFLUENCE OF RECEIVING WATER TANK SLOSHING ON WATER DISTRIBUTION SYSTEM." Journal of JAEE 7, no. 1 (2007): 27–42. http://dx.doi.org/10.5610/jaee.7.27.

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24

Andi Trimulyono, Deddy Chrismianto, Haikal Atthariq, and Samuel Samuel. "Numerical Simulation Low Filling Ratio of Sway Sloshing in the Prismatic Tank Using Smoothed Particle Hydrodynamics." CFD Letters 14, no. 7 (July 17, 2022): 113–23. http://dx.doi.org/10.37934/cfdl.14.7.113123.

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Sloshing is one of challenging problem in the free surface flow, because is dealing with large deformation of fluid. The present paper was carried out of numerical sloshing in the prismatic tank that resemble of LNG membrane type carrier. Pressure sensor was used to validate the dynamic pressure in low filling ratio of tank. Forced oscillation motion in sway with f = 1.08 Hz and amplitude of motion 6.52 mm. A single, and double vertical baffles are used to reduce dynamic pressure and hydrodynamic force. The ratio of baffle heigh with water depth is 0.9. A meshless computational fluid dynamics (CFD) was used to reproduce sloshing in the prismatic tank. Smoothed particle hydrodynamics (SPH) is one of the major meshless CFD. In addition, The advanced visualization was performed using Blender version 2.92. The results showed the vertical baffles effectively reduce the dynamic pressure and hydrodynamic force. Moreover, the advanced visualisation made sloshing simulation more realistic, and attracting compare conventional SPH post-processing.

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25

Lee, Tzung-hang, Zhengquan Zhou, and Yusong Cao. "Numerical Simulations of Hydraulic Jumps in Water Sloshing and Water Impacting." Journal of Fluids Engineering 124, no. 1 (September 13, 2001): 215–26. http://dx.doi.org/10.1115/1.1436097.

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A numerical investigation on Glimm’s method as applied to water sloshing and impacting is carried out. Emphasis is given to the handling and predicting hydraulic jumps. The effects of the spatial and temporal discretizations are examined. Three shallow water problems, 1) dam-breaking problem, 2) water sloshing in a rolling tank, and 3) impact of breaking of a water reservoir, are studied. It is shown numerically that Glimm’s method is stable and converged solutions can be obtained. The characteristics of the hydraulic jumps are well captured by the numerical calculations. The numerical results are in good agreement with either analytical solutions or experimental data.

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He, Tao, Dakui Feng, Liwei Liu, Xianzhou Wang, and Hua Jiang. "CFD Simulation and Experimental Study on Coupled Motion Response of Ship with Tank in Beam Waves." Journal of Marine Science and Engineering 10, no. 1 (January 14, 2022): 113. http://dx.doi.org/10.3390/jmse10010113.

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Tank sloshing is widely present in many engineering fields, especially in the field of marine. Due to the trend of large-scale liquid cargo ships, it is of great significance to study the coupled motion response of ships with tanks in beam waves. In this study, the CFD (Computational Fluid Dynamics) method and experiments are used to study the response of a ship with/without a tank in beam waves. All the computations are performed by an in-house CFD solver, which is used to solve RANS (Reynold Average Navier-Stokes) equations coupled with six degrees-of-freedom solid-body motion equations. The Level Set Method is used to solve the free surface. Verification work on the grid number and time step size has been conducted. The simulation results agree with the experimental results well, which shows that the numerical method is accurate enough. In this paper, several different working conditions are set up, and the effects of the liquid height in the tank, the size of the tank and the wavelength ratio of the incident wave on the ship’s motion are studied. The results show the effect of tank sloshing on the ship’s motion in different working conditions.

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27

Zhang, Zhi, Chenning Song, Zhining Duan, and Zhi Cheng. "Experimental and Numerical Studies of AP1000 Shield Building considering Fluid-Structure Interaction." Science and Technology of Nuclear Installations 2022 (September 2, 2022): 1–16. http://dx.doi.org/10.1155/2022/6458549.

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The gravity cooling water tank is a remarkable structural feature of third-generation pressurized water reactor nuclear power plant. To investigate the influence of fluid-structure interaction (FSI) on the seismic response of the structure, this study designed two 1 : 50 simplified models of the AP1000 shield building. A series of shaking table tests were conducted to study the seismic responses with and without FSI effect. The natural frequency, acceleration, strain, and hydrodynamic pressure of the two models were analyzed, and the seismic reduction effect of the water tank was evaluated. Moreover, the test data were compared with the results of numerical analysis using the ABAQUS software. The results show that the presence of water and the sloshing of water reduce the natural frequency and seismic response of the model structure. Thus, the gravity cooling water tank has a certain seismic reduction effect. The simplified model of water sloshing can be used to analyze the seismic response of the shield building.

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28

Kim, Sung-Wan, Dong-Uk Park, Bub-Gyu Jeon, and Sung-Jin Chang. "Non-Contact Water Level Response Measurement of a Tubular Level Gauge Using Image Signals." Sensors 20, no. 8 (April 14, 2020): 2217. http://dx.doi.org/10.3390/s20082217.

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The occurrence of excessive fluid sloshing during an earthquake can damage structures used to store fluids and can induce secondary disasters, such as environmental destruction and human casualties, due to discharge of the stored fluids. Thus, to prevent such disasters, it is important to accurately predict the sloshing behavior of liquid storage tanks. Tubular level gauges, which visually show the fluid level of a liquid storage tank, are easy to install and economical compared to other water level gauges. They directly show the fluid level and can be applied for various fluids because they can be constructed with various materials according to the fluid characteristics and the intended use. Therefore, in this study, the shaking table test was conducted to verify the validity of the method for measuring the water level response of the tubular level gauge installed on a liquid storage tank using image signals. In addition, image enhancement methods were applied to distinguish between the float installed in the tubular level gauge and the gray level of the background.

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29

Pasquino, Vittorio, and Enrico Ricciardi. "Numerical Vs. Experimental Simulation of a Suspended Water Tank Considering Dynamic Sloshing Effects." Applied Mechanics and Materials 405-408 (September 2013): 3307–17. http://dx.doi.org/10.4028/www.scientific.net/amm.405-408.3307.

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This paper presents the experimental simulation on a prototype of a typical suspended water tank. The experimental results have been compared with numerical simulations by adopting two different models for the evaluation of the dynamic sloshing effects in presence of the seismic actions. The first one is a concentrated mass model, analyzed by the numerical code SAP2000 and the second one is a continuous model analyzed by the numerical code FemLab. The results of the experimental analysis allowed the validation of the numerical modeling and showed the importance to evaluate the dynamic sloshing effects in the design and in the seismic verification of a water tank in seismic areas. The experimental investigation confirms the reliability of the numerical models proposed, by highlighting the validity of the simplified model with concentrated masses for the evaluation of the shear force and the bending moment at the base of the tank. More sophisticated numerical modeling are needed only for the evaluating the stress/strain states generated in the walls of the water tank.

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30

Wang, Tengxiao, Heng Jin, Mengfan Lou, Xinyu Wang, and Yi Liu. "Motion Responses of a Berthed Tank under Resonance Coupling Effect of Internal Sloshing and Gap Flow." Water 13, no. 24 (December 17, 2021): 3625. http://dx.doi.org/10.3390/w13243625.

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The growth of global energy transportation has promoted the rapid increase of large-scale LNG (liquefied natural gas) carriers, and concerns around the safety of LNG ships has attracted significant attention. Such a floating structure is affected by the external wave excitation and internal liquid sloshing. The interaction between the structure’s motion and the internal sloshing under wave actions may lead to the ship experiencing an unexpected accident. In this research, a hydrodynamic experiment is conducted to investigate the motion responses of a floating tank mooring, both close to and away from a dock. The resonance coupling effect of the internal sloshing and gap flow on the tank’s motion is considered. Based on the measured motion trajectory of the floating tank, the stability and safety of the floating tank are estimated. The results show that the sloshing resonance and narrow gap resonance are beneficial to the stability of the ship. This is helpful for controlling the motion of a berthed ship under wave action with a reasonable selection of the gap distance and the liquid level.

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31

SONE, Ryuta, Taisuke ONO, Tsuyoshi IDA, Hirokazu HIRANO, and Naotsugu SATO. "Countermeasures for Rectangular-Section Water Tank against Sloshing Phenomenon." Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM)) 69, no. 2 (2013): I_833—I_843. http://dx.doi.org/10.2208/jscejam.69.i_833.

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32

Dumitrache, C. L., D. Deleanu, and C. Scurtu. "Sloshing effect, design and optimisation of water ballast tank." Journal of Physics: Conference Series 1297 (September 2019): 012003. http://dx.doi.org/10.1088/1742-6596/1297/1/012003.

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33

MINOWA, Chikahiro. "Sloshing Impact of a Rectangular Water Tank. Water Tank Damage Caused by the Kobe Earthquake." Transactions of the Japan Society of Mechanical Engineers Series C 63, no. 612 (1997): 2643–49. http://dx.doi.org/10.1299/kikaic.63.2643.

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34

Trimulyono, Andi, Haikal Atthariq, Deddy Chrismianto, and Samuel Samuel. "INVESTIGATION OF SLOSHING IN THE PRISMATIC TANK WITH VERTICAL AND T-SHAPE BAFFLES." Brodogradnja 73, no. 2 (April 1, 2022): 43–58. http://dx.doi.org/10.21278/brod73203.

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The demand for liquid carriers, such as liquefied natural gas (LNG), has increased in recent years. One of the most common types of LNG carriers is the membrane type, which is often built by a shipyard with a prismatic tank shape. This carrier is commonly known for its effective ways to mitigate sloshing using a baffle. Therefore, this study was performed to evaluate sloshing in a prismatic tank using vertical and T-shape baffles. The sloshing was conducted with 25% and 50% filling ratios because it deals with the nonlinear free-surface flow. Furthermore, the smoothed particle hydrodynamics (SPH) was used to overcome sloshing with ratio of a baffle and water depth is 0.9. A comparison was made for the dynamic pressure with the experiment. The results show that SPH has an acceptable accuracy for dynamic and hydrostatic pressures. Baffle installation significantly decreases the wave height, dynamic pressure and hydrodynamic force.

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35

Isaacson, Michael, and Chung-Son Ryu. "Directional effects of earthquake-induced sloshing in rectangular tanks." Canadian Journal of Civil Engineering 25, no. 2 (April 1, 1998): 376–82. http://dx.doi.org/10.1139/l97-088.

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The influence of the direction of earthquake motions on the hydrodynamic loads on a fluid-filled rectangular tank and on the associated amplitudes of the water surface elevation is investigated. A superposition of the closed-form solution for motion parallel to a pair of sides is used to develop analytical results for an arbitrary direction of motion. The resulting solution is used to examine the effects of motion direction on the maximum force on the tank for both harmonic and earthquake-induced motions. For a harmonic motion, the highest loads occur for a motion parallel to a pair of sides, whereas the highest elevations generally occur for an intermediate direction of motion. For an earthquake-induced motion, both the highest loads and the highest elevations occur for a motion parallel to a pair of sides. An example application is provided, and the implication of the results on the design of rectangular tanks is indicated.Key words: added mass, damping, earthquakes, hydrodynamics, reservoirs, sloshing, tanks.

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36

Cruchaga, Marcela A., Carlos Ferrada, Nicolás Márquez, Sebastián Osses, Mario Storti, and Diego Celentano. "Modeling the sloshing problem in a rectangular tank with submerged incomplete baffles." International Journal of Numerical Methods for Heat & Fluid Flow 26, no. 3/4 (May 3, 2016): 722–44. http://dx.doi.org/10.1108/hff-08-2015-0315.

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Purpose – The present work is an experimental and numerical study of a sloshing problem including baffle effects. The purpose of this paper is to assess the numerical behavior of a Lagrangian technique to track free surface flows by comparison with experiments, to report experimental data for sloshing at different conditions and to evaluate the effectiveness of baffles in limiting the wave height and the wave propagation. Design/methodology/approach – Finite element simulations performed with a fixed mesh technique able to describe the free surface evolution are contrasted with experimental data. The experiments consist of an acrylic tank of rectangular section designed to attach baffles of different sizes at different distance from the bottom. The tank is filled with water and mounted on a shake table able to move under controlled horizontal motion. The free surface evolution is measured with ultrasonic sensors. The numerical results computed for different sloshing conditions are compared with the experimental data. Findings – The reported numerical results are in general in good agreement with the experiments. In particular, wave heights and frequencies response satisfactorily compared with the experimental data for the several cases analyzed during steady state forced sloshing and free sloshing. The effectiveness of the baffles increases near resonance conditions. From the set of experiments studied, the major reduction of the wave height was obtained when larger baffles were positioned closer to the water level at rest. Practical implications – Model validation: evaluation of the effectiveness of non-massive immersed baffles during sloshing. Originality/value – The value of the present work encompass the numerical and experimental study of the effect of immersed baffles during sloshing under different imposed conditions and the comparison of numerical results with the experimental data. Also, the results shown in the present work are a contribution to the understanding of the role in the analysis of the proposed problem of some specific aspects of the geometry and the imposed motion.

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37

Zhang, Chongwei, Xiaotong Sun, Pengfei Wang, Lifen Chen, and Dezhi Ning. "Hydrodynamics of a floating liquid-tank barge adjacent to fixed structure in beam waves." Physics of Fluids 34, no. 4 (April 2022): 047114. http://dx.doi.org/10.1063/5.0089127.

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Physical experiments are conducted in a wave flume to investigate the hydrodynamic behavior of a liquid-tank barge floating near an identical barge. The two barges are arranged side-by-side and subjected to the action of beam waves. The floating barge is equipped with two liquid tanks and encounters the waves before the second barge. Systematic investigations on the effects of liquid tanks, mooring constraints, and arrangement configurations provide rich findings on the physics of fluids. Mathematical solutions are also derived to interpret the underlying mechanism behind the experimental observations. Our primary findings suggest two essential modes, i.e., trend and oscillatory components, in the motion of the floating barge. Of these, the oscillatory component can be strongly coupled with the liquid sloshing in the tanks. A mean-drift load caused by internal sloshing waves occurs as a result of the second-order nonlinearity, which significantly modulates the mean-drift force induced by external water waves and may change the drift direction of the floating barge. The properties of the mooring constraints effectively determine the trend component. Regardless of the liquid filling level in the tanks, the maximum ratio of the sloshing-wave height to the oscillatory amplitude of the barge always occurs at the fundamental natural sloshing period. The contributions of radiation damping and viscous damping to the barge oscillation are explicitly distinguished. The physical insights revealed in this study will help guarantee the operational safety of side-by-side floating structures.

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38

Agresta, Antonio, Nicola Cavalagli, Chiara Biscarini, and Filippo Ubertini. "Effect of Bottom Geometry on the Natural Sloshing Motion of Water inside Tanks: An Experimental Analysis." Applied Sciences 11, no. 2 (January 10, 2021): 605. http://dx.doi.org/10.3390/app11020605.

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The present work aims at understanding and modelling some key aspects of the sloshing phenomenon, related to the motion of water inside a container and its effects on the substructure. In particular, the attention is focused on the effects of bottom shapes (flat, sloped and circular) and water depth ratio on the natural sloshing frequencies and damping properties of the inner fluid. To this aim, a series of experimental tests has been carried out on tanks characterised by different bottom shapes installed over a sliding table equipped with a shear load cell for the measurement of the dynamic base shear force. The results are useful for optimising the geometric characteristics of the tank and the fluid mass in order to obtain enhanced energy dissipation performances by exploiting fluid–structure interaction effects.

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39

Agresta, Antonio, Nicola Cavalagli, Chiara Biscarini, and Filippo Ubertini. "Effect of Bottom Geometry on the Natural Sloshing Motion of Water Inside Tanks: An Experimental Analysis." Applied Sciences 11, no. 2 (January 10, 2021): 605. http://dx.doi.org/10.3390/app11020605.

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Анотація:

The present work aims at understanding and modelling some key aspects of the sloshing phenomenon, related to the motion of water inside a container and its effects on the substructure. In particular, the attention is focused on the effects of bottom shapes (flat, sloped and circular) and water depth ratio on the natural sloshing frequencies and damping properties of the inner fluid. To this aim, a series of experimental tests has been carried out on tanks characterised by different bottom shapes installed over a sliding table equipped with a shear load cell for the measurement of the dynamic base shear force. The results are useful for optimising the geometric characteristics of the tank and the fluid mass in order to obtain enhanced energy dissipation performances by exploiting fluid–structure interaction effects.

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40

Gui, Fu-kun, and Sheng-chao Jiang. "Numerical Simulation of Liquid Sloshing Problem under Resonant Excitation." Advances in Mechanical Engineering 6 (January 1, 2014): 834657. http://dx.doi.org/10.1155/2014/834657.

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Numerical simulations were conducted to investigate the fluid resonance in partially filled rectangular tank based on the OpenFOAM package of viscous fluid model. The numerical model was validated by the available theoretical, numerical, and experimental data. The study was mainly focused on the large amplitude sloshing motion and the corresponding impact force around the resonant condition. It was found that, for the 2D situation, the double pressure peaks happened near to the side walls around the still water level. And they were corresponding to the local free surface rising up and set-down, respectively. The impulsive loads on the tank corner with extreme magnitudes were observed as the free surface impacted the ceiling. The 3D numerical results showed that the free surface amplitudes along the side walls varied diversely, depending on the direction and frequency of the external excitation. The characteristics of the pressure around the still water level and tank ceiling were also presented. According to the computational results, it was found that the 2D numerical model can predict the impact loads near the still water level as accurately as 3D model. However, the impulsive pressure near the tank ceiling corner was remarkably underestimated.

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41

Gradinscak, Marija, and Farial Jafar. "Computational Modelling of Liquid Sloshing in Rectangular Tank." Applied Mechanics and Materials 365-366 (August 2013): 186–89. http://dx.doi.org/10.4028/www.scientific.net/amm.365-366.186.

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Liquid sloshing inside a partially filled rectangular tank has been investigated. The fluid is assumed to be water and the tank is forced to move along x axis to simulate the actual tank excitation. The volume of fluid technique is used to track the free surface and the model solves Navier_Stokes equations by the use of the finite difference estimation. At each time step, a donar-acceptor method is used to transport the volume of fluid function and locations of the free surface. In this paper the location and transport of the free surface in the tank have been investigated using a CFD code (FLUENT) for 3D configuration. The use of a numerical tool has resulted in a detailed investigation of these characteristics, which have not been available in the literature previously.

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42

FALTINSEN, ODD M., OLAV F. ROGNEBAKKE, IVAN A. LUKOVSKY, and ALEXANDER N. TIMOKHA. "Multidimensional modal analysis of nonlinear sloshing in a rectangular tank with finite water depth." Journal of Fluid Mechanics 407 (March 25, 2000): 201–34. http://dx.doi.org/10.1017/s0022112099007569.

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The discrete infinite-dimensional modal system describing nonlinear sloshing of an incompressible fluid with irrotational flow partially occupying a tank performing an arbitrary three-dimensional motion is derived in general form. The tank has vertical walls near the free surface and overturning waves are excluded. The derivation is based on the Bateman–Luke variational principle. The free surface motion and velocity potential are expanded in generalized Fourier series. The derived infinite-dimensional modal system couples generalized time-dependent coordinates of free surface elevation and the velocity potential. The procedure is not restricted by any order of smallness. The general multidimensional structure of the equations is approximated to analyse sloshing in a rectangular tank with finite water depth. The amplitude–frequency response is consistent with the fifth-order steady-state solutions by Waterhouse (1994). The theory is validated by new experimental results. It is shown that transients and associated nonlinear beating are important. An initial variation of excitation periods is more important than initial conditions. The theory is invalid when either the water depth is small or water impacts heavily on the tank ceiling. Alternative expressions for hydrodynamic loads are presented. The procedure facilitates simulations of a coupled vehicle–fluid system.

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43

Radnić, Jure, Nikola Grgić, Marina Sunara Kusić, and Alen Harapin. "Shake table testing of an open rectangular water tank with water sloshing." Journal of Fluids and Structures 81 (August 2018): 97–115. http://dx.doi.org/10.1016/j.jfluidstructs.2018.04.020.

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44

Disimile, Peter J., John M. Pyles, and Norman Toy. "Hydraulic Jump Formation in Water Sloshing Within an Oscillating Tank." Journal of Aircraft 46, no. 2 (March 2009): 549–56. http://dx.doi.org/10.2514/1.38493.

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45

GU, HANBIN, YANBAO LI, and PENGZHI LIN. "MODELING 3D FLUID SLOSHING USING LEVEL SET METHOD." Modern Physics Letters B 19, no. 28n29 (December 20, 2005): 1743–46. http://dx.doi.org/10.1142/s0217984905010360.

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A three-dimension numerical wave model (3DWAVE) has been developed to simulate free surface flows. The model solves Navier-Stokes equations for two-phase flows of air and water. The level set method is employed to track water surfaces. The model is tested for water sloshing in a 3-D confined tank. The relative error in the mass and total energy computation is less than 1%. Excellent agreements between numerical results and analytical solution are obtained for free surface calculation. The nonlinearity in the 3-D fluid sloshing is analyzed. These have laid a foundation on research of breaking waves.

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46

Jiang, Hua, Yi You, Zhenhong Hu, Xing Zheng, and Qingwei Ma. "Comparative Study on Violent Sloshing with Water Jet Flows by Using the ISPH Method." Water 11, no. 12 (December 9, 2019): 2590. http://dx.doi.org/10.3390/w11122590.

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The smoothed particle hydrodynamics (SPH) method has been playing a more and more important role in violent flow simulations since it is easy to deal with the large deformation and breaking flows from its Lagrangian particle characteristics. In this paper, the incompressible SPH (ISPH) method was used to simulate the liquid sloshing in a 2D tank with water jet flows. The study compares the liquid sloshing under different water jet conditions to analyze the effects of the excitation frequency and the water jet on impact pressure. The results demonstrate that the water jet flows can significantly affect the impact pressures on the wall caused by violent sloshing. The main purpose of the paper is to test the ISPH ability for this study and some useful regulars that are obtained from different numerical cases and study the effect of their practical importance.

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47

Sabri, Dilheen, and Hussein Zekri. "Numerical Assessment of Gravity for Sloshing in Tank Using OpenFOAM." European Journal of Pure and Applied Mathematics 15, no. 4 (October 31, 2022): 2022–31. http://dx.doi.org/10.29020/nybg.ejpam.v15i4.4608.

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We numerically study gravity’s effect on sloshing in a two-dimensional tank which is highly filled by water (95% water and 5% air). Both fluids are considered to be incompressible and inviscid. The surface tension and phase change are neglected. OpenFOAM software is used for the simulation. A standing wave of water impacting the lid of the tank at its center and a symmetric wetted region starts to advance along the lid. The simulation carried out (only on the right-half side of the tank due to symmetric geometry of the impact) with and without gravity to investigate the influence of gravity on this impact. The numerical results are validated by comparing to published data. The effect of gravity on the size of the wetted region, free-surface elevation and on the pressure distribution has been analyzed. It is shown that gravity is affecting the free-surface elevation and consequently the size of the wetted region. These effects growth as time goes. Pressure distribution along the wetted region of the lid is also influenced by gravity.

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48

Demirel, Ender, and Mustafa Aral. "Liquid Sloshing Damping in an Accelerated Tank Using a Novel Slot-Baffle Design." Water 10, no. 11 (November 2, 2018): 1565. http://dx.doi.org/10.3390/w10111565.

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A slot-baffle design used in water treatment tanks previously developed by the authors is used to suppress sloshing effects in an accelerated tank. This new application is another example of the versatility of the slot-baffle design in inducing turbulence in fluid flow systems, which has numerous uses in engineering applications. Large amplitude surface waves in a harmonically excited tank are simulated using a second-order accurate numerical model in OpenFOAM. The verification of the numerical model is performed by comparing the numerical results with existing laboratory measurements, which show a favorable agreement. Various slot configurations are studied in order to evaluate the damping performance during the external excitation of the tank. It is shown that the present design shows an effective dissipation performance in a broad range of oscillation frequencies, while 88% of the internal kinetic energy of the liquid is dissipated over thirty oscillation periods for the resonance case.

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49

Chawhan, Rechal L., Nikhil H. Pitale, S. S. Solanke, and Mangesh Saiwala. "Use of Tuned Liquid Damper to Control Structural Vibration Structural." IOP Conference Series: Materials Science and Engineering 1197, no. 1 (November 1, 2021): 012053. http://dx.doi.org/10.1088/1757-899x/1197/1/012053.

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Abstract The aim of this paper is to study the tuned liquid damper and it’s effectivness. The tunned liquid dampers are simply tuned mass damper where the liquid (usually water) replaces the mass.Tuned liquid dampers is a water tank placed over the structure which is able to reduce the dynamic structural response subjected to stimulation through sloshing effect. The effectiveness of tuned liquid damper depends upon various parameters. Tuned liquid damper are suitable for high rise building rather than short building. The tuned liquid damper decreases effect of harmonic excitation by Dissipating the energy of excitation through sloshing phenomenon.

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50

Guillot, Martin J. "Application of a Discontinuous Galerkin Finite Element Method to Liquid Sloshing." Journal of Offshore Mechanics and Arctic Engineering 128, no. 1 (May 25, 2005): 1–10. http://dx.doi.org/10.1115/1.2151204.

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A Runge-Kutta discontinuous Galerkin (RKDG) finite element method is applied to the liquid sloshing problem using the depth-averaged shallow water equations in a rotating frame of reference. A weak statement formulation is developed by multiplying the equations by a test function and integrating over a typical element. The basis functions are Legendre polynomials of degree one, resulting in formally second-order spatial accuracy. Second-order time integration is achieved using a second-order Runge-Kutta method. A minmod slope limiter is incorporated into the solution near discontinuities to control nonphysical oscillations and to ensure nonlinear total variation bounded stability. The method is first applied to the dam-breaking problem with zero rotation to validate the basic numerical implementation. Grid independence of the solutions is established and solution error is quantified by computing the L1 norm and comparing the estimated convergence rates to theoretical convergence rates. Stability is demonstrated subject to a Courant-Fredricks-Lewey restriction. Sloshing in a nonrotating tank with a prescribed initial water surface elevation is first investigated to demonstrate the ability of the method to capture the wave speed of traveling waves, followed by a tank undergoing sinusoidal rotation. Time histories of water surface elevation at selected locations, as well as pressure distribution on the tank walls and the corresponding moment about the tank centerline are computed and compared to experimental data and to previous computations. Finally, a limited parameter study is performed to determine the effect of varying roll angle, depth to width ratio, and forcing frequency on the resulting maximum moment about the tank centerline.

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