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Journal articles on the topic 'DEFLECTOR PLATE'

Author: Grafiati

Published: 11 September 2023

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1

Misyulya, D. I., A. A. Borovik, and S. K. Protasov. "Conic plate deflector." Russian Journal of Applied Chemistry 82, no. 4 (2009): 696–98. http://dx.doi.org/10.1134/s1070427209040302.

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2

Faizal Hakim Hidzir, Mohd, Khairul Imran Sainan, and Hazran Husain. "Title of the Integrity Analysis of O&G Standpipe Separator: Numerical Study Article." International Journal of Engineering & Technology 7, no. 4.27 (2018): 73. http://dx.doi.org/10.14419/ijet.v7i4.27.22483.

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A standpipe is a component that functions to remove the condensate of gas from the oil that flows inside the O&G piping system underneath. Efficient gas removal promotes better crude oil quality and increases productivity. The deflector plates integrity in a stand pipe, where thin plates are mounted on the pipe walls periodically in the direction of fluid flow, has been numerically investigated. The aim of this investigation is to determine how the working fluid density and deflectors thickness influenced the plates integrity. Two working fluids were tested. Natural gas and crude oil which

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3

Yao, Gang, Linjun Wu, Yang Yang, Maoyi Liu, Yuxiao Chen, and Hongbo Du. "Study on the Suppression Effect on Vortex-Induced Vibration of Double-Deck Truss Girder by the Spatial Position of the Deflector Plate." Applied Sciences 13, no. 17 (2023): 9764. http://dx.doi.org/10.3390/app13179764.

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This paper carried out wind tunnel tests and numerical analysis to study the effect of the spatial position of deflector plates on the vortex-induced vibration (VIV) of a double-deck truss girder. The wind tunnel tests found that setting the web deflector plate and the lower chord deflector plate significantly suppressed the VIV. In order to study the suppression mechanism of the deflector plate on VIV, numerical simulations were conducted using the computational fluid dynamics (CFD) method. We analyzed the suppression mechanism of the deflector plate on VIV by combining the vertical amplitude

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4

Son, Namjeong, Yoojin Kim, Mimi Min, Seungho Jung, and Chankyu Kang. "Numerical Investigation of Overtopping Prevention for Optimal Safety Dike Design." International Journal of Environmental Research and Public Health 19, no. 24 (2022): 16429. http://dx.doi.org/10.3390/ijerph192416429.

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Leakage accidents at chemical facilities have a negative impact on both the environment and human life, and the government has established and implemented regulations on dikes in order to minimize such accidents. However, the overtopping phenomenon in which chemicals overflow the dike due to catastrophic leakage requires additional safeguards. In this study, the mitigation effect was confirmed by simulating tanks and dikes using various deflector plates to minimize the effect of spilled chemicals. ANSYS Fluent 19.1, a computational fluid dynamics program, was used, and the overtopping effect w

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5

Kailash, Golecha, T. I. Eldho, and S. V. Prabhu. "Performance Study of Modified Savonius Water Turbine with Two Deflector Plates." International Journal of Rotating Machinery 2012 (2012): 1–12. http://dx.doi.org/10.1155/2012/679247.

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Savonius rotor is a vertical axis rotor with simple in design and easy to fabricate at lower cost. The rotation of the rotor is due to the drag difference between the advancing blade and returning blade. Net driving force can be increased by reducing the reverse force on the returning blade or increasing the positive force on the advancing blade. Former can be realized by providing a flow obstacle to the returning blade and latter can be realized by concentrating the flow towards the advancing blade. The objective of the present work is to identify the optimal position of the deflector plate (

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6

Iwasińska-Kowalska, Olga. "A SYSTEM FOR PRECISE LASER BEAM ANGULAR STEERING." Metrology and Measurement Systems 21, no. 1 (2014): 27–36. http://dx.doi.org/10.2478/mms-2014-0003.

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Abstract A system for precise angular laser beam deflection by using a plane mirror is presented. The mirror was fixed to two supports attached to its edges. This article details the theoretical basis of how this deflector works. The spring deflection of a flat circular metal plate under a uniform axial buckling was used and the mechanical stress was generated by a piezoelectric layer. The characteristics of the deformation of the plate versus the voltage control of the piezoelectrics were examined and the value of the change resolution possible to obtain was estimated. An experimental system

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7

Gao, Guangjun, Yan Zhang, Fei Xie, et al. "Numerical study on the anti-snow performance of deflectors in the bogie region of a high-speed train using the discrete phase model." Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 233, no. 2 (2018): 141–59. http://dx.doi.org/10.1177/0954409718785290.

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In this paper, the three-dimensional unsteady Reynolds-averaged Navier-Stokes equations with an RNG double-equation turbulence model and a discrete phase model were used for the investigation of snow accumulation on the bogie of a high-speed train. Two kinds of deflector plates, one installed at the front end and the other at the rear end of the bogie, were proposed to reduce snow accumulation. The accuracy of the CFD methodology was validated against wind tunnel tests. The results showed that high-speed air will impact the plates where snow particles get accumulated. The snow covering on the

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8

Escartí-Guillem, Mara S., Sergio Hoyas, and Luis M. Garcia-Raffi. "Deflector shape impact on aero-acoustic noise generation and propagation." Journal of the Acoustical Society of America 152, no. 4 (2022): A222. http://dx.doi.org/10.1121/10.0016076.

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The vibroacoustic loading generated during the launch of space vehicles can cause the failure of electronic and mechanical components. Therefore, the prediction and mitigation of these vibroacoustic levels are crucial to improve the reliability of launchers and payload comfort. Because a properly designed flame deflector has the power to significantly reduce the acoustic pressure level, the aeroacoustics characteristics of diverse types of flame deflectors must be understood. Three different deflector geometries have been analysed: a wedge-type deflector, which is currently used on the VEGA ro

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9

Yu, Shao Zhen, Yi Jiang, Yan Li Ma, Yan Yan Ma, and Bo Wei Liu. "Simulation and Optimize Design for Deflector Plate of the Vehicle Mounted Vertically Thermal Launched Missile." Advanced Materials Research 459 (January 2012): 579–83. http://dx.doi.org/10.4028/www.scientific.net/amr.459.579.

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In this dissertation, academic analysis of the influence to deflector plate in gas jet field of a Vehicle-mounted Vertically Thermal Launched missile as well as simulation study. The finite volume method, a fully structured grid, three-dimensional N-S equation is used for the numerical simulation of the process during the missile launching. The two main factors: temperature and forces on the launcher is the standard we test a launching system. The temperature on the position we test will rise with the decreasing length of the deflector. Especially, when the length is near to the potential core

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10

Verma, R. S., M. A. Jo, and A. S. Deora. "Forced Convection Across Horizontal Hot Cylinder Using Slotted Deflector Plate." Journal of The Institution of Engineers (India): Series C 94, no. 3 (2013): 275–79. http://dx.doi.org/10.1007/s40032-013-0075-z.

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11

Tanino, Tadakazu, Ryo Yoshihara, and Takeshi Miyaguni. "A Study on a Casing Consisting of Three Flow Deflectors for Performance Improvement of Cross-Flow Wind Turbine." Energies 15, no. 16 (2022): 6093. http://dx.doi.org/10.3390/en15166093.

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We investigated the effective use of cross-flow wind turbines for small-scale wind power generation to increase the output power by using a casing, which is a kind of wind-collecting device, composed of three flow deflector plates having the shape of a circular-arc airfoil. Drag-type vertical-axis wind turbines have an undesirable part of about half of the swept area where the inflow of wind results in low output performance. To solve this problem, we devised a casing consisting of three flow deflector plates, two of which were to block the unwanted inflow of wind and the remaining flow deflec

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12

Sahim, Kaprawi, Kadafi Ihtisan, Dyos Santoso, and Riman Sipahutar. "Experimental Study of Darrieus-Savonius Water Turbine with Deflector: Effect of Deflector on the Performance." International Journal of Rotating Machinery 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/203108.

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The reverse force on the returning blade of a water turbine can be reduced by setting a deflector on the returning blade side of a rotor. The deflector configuration can also concentrate the flow which passes through the rotor so that the torque and the power of turbine can be considerably increased. The placing of Savonius in Darrieus rotor is carried out by setting the Savonius bucket in Darrieus rotor at the same axis. The combination of these rotors is also called a Darrieus-Savonius turbine. This rotor can improve torque of turbine. Experiments are conducted in an irrigation canal to find

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13

Bai, Hua, Wei Guo, Wei Li, and Yu Li. "Research on the Influence of the Aerodynamic Measure on the Flutter Derivative of the Steel Truss Suspension Bridge." Advanced Materials Research 532-533 (June 2012): 252–56. http://dx.doi.org/10.4028/www.scientific.net/amr.532-533.252.

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Flutter derivative is a significant index of the structure flutter stability. Identifying flutter derivative precisely contributes to the bridge flutter stability analyzing. In this paper, we take a research on the Liujiaxia Bridge in Gansu Province, China. Different flutter derivatives, which were got via segment model vibration tests with different aerodynamic measures, were classified, and made comparison in order to get the law of how different aerodynamic measures effect on the flutter derivative. The results show that, setting central stabilized plate, Build-in deflector, flange plate al

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14

Käläntär, K., S. Matsumoto, T. Onishi, and K. Takizawa. "43.2: Optical Micro Deflector Based Functional Light-Guide Plate for Backlight Unit." SID Symposium Digest of Technical Papers 31, no. 1 (2000): 1029. http://dx.doi.org/10.1889/1.1832838.

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15

Raina, Ankush, G. A. Harmain, and Mir Irfan Ul Haq. "Numerical investigation of flow around a 3D bluff body using deflector plate." International Journal of Mechanical Sciences 131-132 (October 2017): 701–11. http://dx.doi.org/10.1016/j.ijmecsci.2017.08.018.

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16

Jeeva, B., S. Jai Sandeep, N. Ramsundram, M. Prasanth, and B. Praveen. "Experimental Investigation of Three Bladed Inclined Savonius Hydrokinetic Turbine by using Deflector Plate." IOP Conference Series: Materials Science and Engineering 1146, no. 1 (2021): 012009. http://dx.doi.org/10.1088/1757-899x/1146/1/012009.

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17

Golecha, Kailash, T. I. Eldho, and S. V. Prabhu. "Influence of the deflector plate on the performance of modified Savonius water turbine." Applied Energy 88, no. 9 (2011): 3207–17. http://dx.doi.org/10.1016/j.apenergy.2011.03.025.

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18

Wang, Wei, Chong Guo, Jingluo Tang, et al. "High-Efficiency and Broadband Near-Infrared Bi-Functional Metasurface Based on Rotary Different-Size Silicon Nanobricks." Nanomaterials 9, no. 12 (2019): 1744. http://dx.doi.org/10.3390/nano9121744.

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Several novel spin-dependent bi-functional metasurfaces consisting of different-sized rotary silicon nanobricks have been proposed and numerically investigated based on the Pancharatnam–Berry phase and structural phase simultaneously. Here, a transmission mechanism is strictly deduced, which can avoid crosstalk from the multiplexed bi-functional metasurface. Four kinds of high-efficiency bi-functional devices have been designed successfully at infrared wavelengths, including a spin-dependent bi-functional beam deflector, a spin-dependent bi-functional metalens, a bi-functional metasurface with

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19

Yu, Shao Zhen, Yi Jiang, Yan Li Ma, Yan Yan Ma, and Bo Wei Liu. "Simulation and Optimize Design for Deflector Plate of the Vehicle Mounted Vertically Thermal Launched Missile." Advanced Materials Research 459 (January 2012): 579–83. http://dx.doi.org/10.4028/scientific5/amr.459.579.

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20

Kuncoro, Ilham Wahyu, Zainal Arifin, Eko Prasetya Budiana, and Miftah Hijriawan. "Improvement Performance Twisted Savonius Wind Turbine on Hybrid System: Effect of Flat Plate Deflector Installation." International Journal of Heat and Technology 41, no. 3 (2023): 742–48. http://dx.doi.org/10.18280/ijht.410330.

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21

Han, Shou Hong, and Zhen Hua Lv. "Study on Blast-Resistant Structural Design of a Truck Cab." Applied Mechanics and Materials 66-68 (July 2011): 2136–41. http://dx.doi.org/10.4028/www.scientific.net/amm.66-68.2136.

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This paper first presented modeling methods and procedures aiming to a truck cab and its occupant under blast loading, followed by numerical simulation analysis of dynamic responses of the cab and blast injuries of the occupant by using Ls_Dyna. According to energy history the response duration can be divided into three phases, corresponding to local effect, whole effect and drop down effect. And two schemes for cab blast-resistant design including an aluminum foam sandwich plate and a V-shape deflector were put forward. Using the proposed numerical models, response characters of the two schem

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22

Несиоловский, О. Г., Р. Д. Адакин, and И. М. Соцкая. "Intensification Simulation of Heat Transfer Process of Bakery-Confectionery Oven Power Generator by Numerical Method." Vestnik APK Verhnevolzh`ia, no. 3(55) (September 30, 2020): 85–89. http://dx.doi.org/10.35694/yarcx.2021.55.3.017.

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Рассмотрен вопрос интенсификации процесса теплоотдачи хлебопекарного теплообменного аппарата (ТА). ТА хлебопекарной печи имеет дополнительную конструктивную особенность – направляющий кожух. Предложено разместить на нём дефлекторы и направляющие пластины, которые изготовлены из нежаропрочных сталей, поскольку они напрямую не контактируют с продуктами горения, а лишь со вторичным теплоносителем. Дефлекторы – это небольшие пластины, установленные перпендикулярно стенке кожуха. Они позволяют образовывать локальные турбулентные завихрения теплоносителя, приводящие к увеличению теплоотдачи. Пластин

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23

Yao, Gang, Yuxiao Chen, Yang Yang, Yuanlin Zheng, Hongbo Du, and Linjun Wu. "Investigation of Vortex-Induced Vibration of Double-Deck Truss Girder with Aerodynamic Mitigation Measures." Journal of Marine Science and Engineering 11, no. 6 (2023): 1118. http://dx.doi.org/10.3390/jmse11061118.

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The long-span double-deck truss girder bridge has become a recommend structural form because of its good performance on traffic capacity. However, the vortex-induced vibration (VIV) characteristics for double-deck truss girders are more complicated and there is a lack of related research. In this research, wind tunnel tests were utilized to investigate the VIV characteristics of a large-span double-deck truss girder bridge. Meanwhile, the VIV suppression effect of the aerodynamic mitigation measures was measured. Furthermore, the VIV suppression mechanism was studied from the perspective of vo

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24

Zhang, Yongchao, Can Kang, Hexiang Zhao, and Hyoung-Bum Kim. "Effects of the deflector plate on performance and flow characteristics of a drag-type hydrokinetic rotor." Ocean Engineering 238 (October 2021): 109760. http://dx.doi.org/10.1016/j.oceaneng.2021.109760.

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25

Wong, Kok Hoe, Wen Tong Chong, Sin Chew Poh, Yui-Chuin Shiah, Nazatul Liana Sukiman, and Chin-Tsan Wang. "3D CFD simulation and parametric study of a flat plate deflector for vertical axis wind turbine." Renewable Energy 129 (December 2018): 32–55. http://dx.doi.org/10.1016/j.renene.2018.05.085.

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26

Kerikous, Emeel, and Dominique Thévenin. "Optimal shape and position of a thick deflector plate in front of a hydraulic Savonius turbine." Energy 189 (December 2019): 116157. http://dx.doi.org/10.1016/j.energy.2019.116157.

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27

Qasemi, Keyhan, and Leila N. Azadani. "Optimization of the power output of a vertical axis wind turbine augmented with a flat plate deflector." Energy 202 (July 2020): 117745. http://dx.doi.org/10.1016/j.energy.2020.117745.

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28

Wong, Kok Hoe, Wen Tong Chong, Nazatul Liana Sukiman, et al. "Experimental and simulation investigation into the effects of a flat plate deflector on vertical axis wind turbine." Energy Conversion and Management 160 (March 2018): 109–25. http://dx.doi.org/10.1016/j.enconman.2018.01.029.

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29

Lin, Han-Tang, Yunn-Horng Guu, and Wei-Hsuan Hsu. "Design and Fabrication of a Novel Window-Type Convection Device." Applied Sciences 11, no. 1 (2020): 267. http://dx.doi.org/10.3390/app11010267.

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Global warming, climate change, and ever-increasing energy demand are among the pressing challenges currently facing humanity. Particularly, indoor air conditioning, a major source of energy consumption, requires immediate improvement to prevent energy crises. In this study, various airfoil profiles were applied to create a window-type convection device that entrains air to improve convection between indoor and outdoor airflows and adjust the indoor temperature. How the geometric structure of the convection device affects its air entrainment performance was investigated on the basis of various

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30

Wang, Huifu, Jian Sun, Yong Li, and Zhen Cao. "Numerical Simulation and Optimization of SCR-DeNOx Systems for Coal-Fired Power Plants Based on a CFD Method." Processes 11, no. 1 (2022): 41. http://dx.doi.org/10.3390/pr11010041.

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In order to solve the problem of the uneven distribution of the flow and ammonia concentration field in the selective catalytic reduction (SCR) denitrification system of a 660 MW coal-fired power plant, a three-dimensional computational fluid dynamics (CFD) model was established at a scale of 1:1. The existing flow guide and ammonia fume mixing device were then calibrated and optimized. The relative standard deviation of the velocity field distribution upstream of the ammonia injection grid (AIG) was optimized from 15.4% to 9.9%, with a reasonable radius of the deflector at the inlet flue elbo

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31

Raina, Ankush, and Akhil Khajuria. "FLOW CONTROL AROUND A 3D-BLUFF BODY USING PASSIVE DEVICE." EPH - International Journal of Science And Engineering 4, no. 1 (2018): 6–10. http://dx.doi.org/10.53555/eijse.v4i1.132.

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This article focuses on the flow control around an Ahmed body using deflector plate. The coefficient of drag was obtained numerically for different flow velocities. The study was carried out using a k-ɛ model for an Ahmed body of 25o rear slant. Grid independence studies were carried out prior to the simulation in order to validate the selected turbulence model. It was observed that coefficient of drag decreases with the increase in flow velocity whereas the lift coefficient increases. A maximum of 13.34 % decrease in drag coefficient was observed for inlet flow velocity of 80 m/s.

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32

Venkatesh, R., Nitesh Kumar, N. Madhwesh, and Manjunath M.S. "CFD analysis for thermal performance augmentation of solar air heater using deflector ribs." Journal of Mechanical Engineering and Sciences 14, no. 3 (2020): 7282–95. http://dx.doi.org/10.15282/jmes.14.3.2020.27.0572.

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This paper presents the effect of deflector ribs on the thermal performance of flat plate solar air heater using Computational Fluid Dynamics (CFD) methodology. The analysis is carried out using two-dimensional computational domain for the Reynolds number range of 6000-18000. RNG k-є turbulence model is used to capture the turbulence characteristics of the flow. The deflector rib has a cross-section of isosceles triangle and is placed transversely with respect to the flow. The distance between consecutive ribs is varied as 40mm, 80mm, 160mm and 320mm while the air gap height is varied as 2mm,

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33

Oye, Michael M., Mark A. Wistey, Jason M. Reifsnider, et al. "Ion damage effects from negative deflector plate voltages during the plasma-assisted molecular-beam epitaxy growth of dilute nitrides." Applied Physics Letters 86, no. 22 (2005): 221902. http://dx.doi.org/10.1063/1.1940126.

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34

Subekti, A., PA Setiawan, Bachtiar, et al. "A numerical study of the effect of a single cylinder and plate deflector toward the Savonius wind turbine performance." Journal of Physics: Conference Series 1477 (March 2020): 052010. http://dx.doi.org/10.1088/1742-6596/1477/5/052010.

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35

Molnár, Vieroslav, Gabriel Fedorko, Nikoleta Husáková, Ján Král' Jr., and Mirosław Ferdynus. "Energy calculation model of an outgoing conveyor with application of a transfer chute with the damping plate." Mechanical Sciences 7, no. 2 (2016): 167–77. http://dx.doi.org/10.5194/ms-7-167-2016.

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Abstract. The energy efficiency of transport systems consisting of several belt conveyors is significantly affected by re-direction. The proper sizing of several conveyor belts using deflector plates can significantly affect their efficiency. At present, there are no uniform rules (models) which specify the methodology and procedures for their design. This paper brings proposals of design of optimal parameters for energy-efficient operation of the transport system consisting of belt conveyors based on the new analytical simulation models. Recommendations for the practical application of transp

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36

Waghmare, Utkarsh, A. S. Dhoble, Ravindra Taiwade, Jagesvar Verma, and Himanshu Vashishtha. "Prediction of heat affected zone and other mechanical properties of welded joints of HSLA A588-B of jet blast deflector." World Journal of Engineering 16, no. 4 (2019): 438–44. http://dx.doi.org/10.1108/wje-08-2018-0281.

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Purpose The purpose of this paper is to predict and optimize the width of heat affected zone (HAZ) with better mechanical properties using suitable welding process and parameters for the fabrication of jet blast deflector (JBD) (high strength low alloy material of grade A588-B was used for fabrication) so that the JBD can sustain high exhaust parameters, because there are different welding zones formed due to the rapid cooling of weld metals. Out of the various zones of welding, HAZ remains the weakest zone in the entire weldment. Design/methodology/approach The present work describes the mode

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Ghannadpour, Seyyed Amir Mahdi, and Hamid Reza Ovesy. "Relative Post-Buckling Stiffness Calculation of Symmetrically Laminated Composite Plates Using an Exact Finite Strip." Advanced Materials Research 123-125 (August 2010): 201–4. http://dx.doi.org/10.4028/www.scientific.net/amr.123-125.201.

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This paper presents the theoretical developments of an exact finite strip for the buckling and initial post-buckling analyses of symmetrically laminated composite plates. The so-called exact finite strip is developed based on the concept that it is effectively a plate. The present method, which is designated by the name Full-analytical Finite Strip Method in this paper, provides an efficient and extremely accurate buckling solution. In the development process, the Von-Karman’s equilibrium equation is solved exactly to obtain the buckling loads and the corresponding form of out-of-plane bucklin

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Sampaio, Luiz Eduardo B., André Luiz T. Rezende, and Angela O. Nieckele. "The challenging case of the turbulent flow around a thin plate wind deflector, and its numerical prediction by LES and RANS models." Journal of Wind Engineering and Industrial Aerodynamics 133 (October 2014): 52–64. http://dx.doi.org/10.1016/j.jweia.2014.07.007.

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39

Qiu, Li Jun, and Su Ying Xu. "Design on Turbocharger Inlet Control Device." Applied Mechanics and Materials 251 (December 2012): 97–100. http://dx.doi.org/10.4028/www.scientific.net/amm.251.97.

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Turbocharger exhaust device is in controlling exhaust speed device. The controllable exhaust device is to improve the turbocharger in the low-speed running of the engine torque output and high speed power output device. Parts processing in a controllable exhaust device and the whole installation process has two problems to be solved. A problem is a rotating plate deflector rod in the assembly welding processing. Another is mounted in the assembly. The solution is improved the structure of apparatus and parts. It is including exhaust control rotor structure, the drive ring structures and device

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40

Tang, Hailong, Yuping Fan, Xiaomin Ma, Xianshu Dong, Ming Chang, and Na Li. "Modelling Flocculation in a Thickener Feedwell Using a Coupled Computational Fluid Dynamics–Population Balance Model." Minerals 13, no. 3 (2023): 309. http://dx.doi.org/10.3390/min13030309.

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The flocculation that takes place in the central feedwell of the thickener plays a crucial role in the coal-slurry thickening process, which is not only complex but also largely influenced by the flow characteristics. A coupled computational fluid dynamics–population balance model (CFD–PBM) was used to model the complex flocculation-thickening behaviour in an industrial-scale gravity thickener. The initialisation parameters of the inlet flow were obtained through self-designed image-recognition experiments, and then the effects of different types of conical deflectors on the floc distribution

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41

Ghannadpour, Seyyed Amir Mahdi, Hamid Reza Ovesy, and Mohammad Hajikazemi. "An Investigation on Relative Post-Buckling Stiffness Variations of Symmetrically Cross-Ply Laminates." Key Engineering Materials 471-472 (February 2011): 1022–27. http://dx.doi.org/10.4028/www.scientific.net/kem.471-472.1022.

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In this paper, the theoretical developments of an exact finite strip for the buckling and initial post-buckling analyses of symmetrically cross-ply laminates are presented. The so-called exact finite strip is developed based on the concept that it is effectively a plate. In the development process, the Von-Karman’s equilibrium equation is solved exactly to obtain the buckling loads and the corresponding form of out-of-plane buckling deflection modes. The investigation of thin flat plate buckling behavior is then extended to an initial post-buckling study with the assumption that the deflected

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42

Liu, Jiachun, Shuangqing Zhang, Biao Huang, and David Z. Zhu. "Numerical study on effects of chamber design and multi-inlet on storm geyser." Water Science and Technology 83, no. 6 (2021): 1286–99. http://dx.doi.org/10.2166/wst.2021.061.

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Abstract Storm geysers increasingly occur in sewer systems under climate change and rapid urbanization. Mitigation measures are in great demand to avoid safety problems. In this study, three-dimensional computational fluid dynamics models of single-inlet and multi-inlet systems were established to investigate geysering induced by rapid filling and assess the effectiveness of potential mitigation methods. The modeling results suggest that increasing the capacity of the downstream pipe before the inflow front reaches the chamber can effectively reduce the maximum geyser pressure. The peak pressu

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Choi, C. E., C. W. W. Ng, G. R. Goodwin, L. H. D. Liu, and W. W. Cheung. "Flume investigation of the influence of rigid barrier deflector angle on dry granular overflow mechanisms." Canadian Geotechnical Journal 53, no. 10 (2016): 1751–59. http://dx.doi.org/10.1139/cgj-2015-0248.

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Mass-wasting processes are often intercepted using rigid barriers, which are sometimes equipped with deflectors to prevent overspilling. Despite the engineering value of deflectors, they are currently only installed using empirical and prescriptive approaches because flow interaction mechanisms are not well understood. A 5 m flume was used to study dry granular flow deposition and overflow processes with and without deflectors of varying angles. The deflector angle was varied as 0°, 30°, 45°, and 60° with respect to the horizontal plane. For the geometric and material parameters adopted in thi

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Rempfer, Gertrude F. "Toward The Simultaneous Correction of Spherical and Chromatic Aberration in Electron Optics by Means of an Electrostatic Electron Mirror." Proceedings, annual meeting, Electron Microscopy Society of America 48, no. 1 (1990): 206–7. http://dx.doi.org/10.1017/s0424820100179786.

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Optimum performance in electron and ion imaging instruments, such as electron microscopes and probe-forming instruments, in most cases depends on a compromise either between imaging errors due to spherical and chromatic aberrations and the diffraction error or between the imaging errors and the current in the image. These compromises result in the use of very small angular apertures. Reducing the spherical and chromatic aberration coefficients would permit the use of larger apertures with resulting improved performance, granted that other problems such as incorrect operation of the instrument

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Chang, Zhiying, and Tinglin Huang. "Analysis of Water-Lifting Aerator Performance Based on the Volume of Fluid Method." Water 15, no. 5 (2023): 991. http://dx.doi.org/10.3390/w15050991.

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Water quality deterioration is a major problem faced by reservoirs globally, owing to the inflow of pollution from industrial and municipal activities. Water-lifting aeration is an in situ water quality improvement technology that mixes and oxygenates deep water bodies in reservoirs to improve pollution control efficiency and water quality. While previous studies have mainly focused on the mixing process in the reservoir outside the water-lifting aerator (WLA), knowledge of the internal flow remains limited. In this study, a two-phase flow within a WLA system was numerically studied using the

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Park, Yeonsang, Hyochul Kim, Jeong-Yub Lee, Woong Ko, Kideock Bae, and Kyung-Sang Cho. "Direction control of colloidal quantum dot emission using dielectric metasurfaces." Nanophotonics 9, no. 5 (2020): 1023–30. http://dx.doi.org/10.1515/nanoph-2020-0158.

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AbstractOwing to the recent developments of dielectric metasurfaces, their applications have been expanding from those pertaining to the thickness shrinkage of passive optical elements, such as lenses, polarizers, and quarter-wave plates, to applications pertaining to their integration with active optical devices, such as vertical-cavity surface-emitting lasers. Even though directional lasing and beam shaping of laser emission have been successfully demonstrated, the integration of metasurfaces with random light sources, such as light-emitting diodes, is limited because of function and efficie

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Clain, Fernanda Mazuco, Paulo Roberto de Freitas Teixeira, and Douglas Bezerra de Araújo. "Two Heat Source Models to Simulate Welding Processes with Magnetic Deflection." Soldagem & Inspeção 22, no. 1 (2017): 99–113. http://dx.doi.org/10.1590/0104-9224/si2201.10.

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Abstract The technique of weaving by magnetic arc deflection was developed a few years ago to enable the oscillation of the weld pool, thus, causing grain refinement and improving the properties on the welded joint. This paper aims to propose two heat source models that include effects of magnetic arc deflection on a bead-on-plate GTAW process in numerical simulations by using the finite element method. Two cases are studied. In the first case, non-deflected arc and straigth magnectic deflected arc along the torch movement are carried out and compared to numerical simulations. Temperatures at

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Wu, Fang Zhen, Michael Dudley, Huan Huan Wang, et al. "The Nucleation and Propagation of Threading Dislocations with C-Component of Burgers Vector in PVT-Grown 4H-SiC." Materials Science Forum 740-742 (January 2013): 217–20. http://dx.doi.org/10.4028/www.scientific.net/msf.740-742.217.

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Studies of threading dislocations with Burgers vector of c+a have been carried out using synchrotron white beam X-ray topography. The nucleation and propagation of pairs of opposite sign threading c+a dislocations is observed. Overgrowth of inclusions by growth steps leads to lattice closure failure and the stresses associated with this can be relaxed by the nucleation of opposite sign pairs of dislocations with Burgers vector c+a. Once these dislocations are nucleated they propagate along the c-axis growth direction, or can be deflected onto the basal plane by overgrowth of macrosteps. For th

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Wang, Ge, Hideomi Ohtsubo, and Kikuo Arita. "Large Deflection of a Rigid-Plastic Circular Plate Pressed by a Sphere." Journal of Applied Mechanics 65, no. 2 (1998): 533–35. http://dx.doi.org/10.1115/1.2789089.

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A rigid-plastic circular plate deflected by a rigid sphere is investigated. The behavior at large deflection is considered; the contribution from a bending moment is neglected. Approximate formulas for the load-deflection relationship are derived. Experiments are conducted and the test data compare well with the prediction results. It is revealed that the size of the rigid sphere has a strong effecton the resistance of the compressed plate.

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FOSS, JUDITH K., and K. B. M. Q. ZAMAN. "Large- and small-scale vortical motions in a shear layer perturbed by tabs." Journal of Fluid Mechanics 382 (March 10, 1999): 307–29. http://dx.doi.org/10.1017/s0022112098003887.

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The large- and small-scale vortical motions produced by ‘delta tabs’ in a two-stream shear layer have been studied experimentally. An increase in mixing was observed when the base of the triangular shaped tab was affixed to the trailing edge of the splitter plate and the apex was pitched at some angle with respect to the flow axis. Such an arrangement produced a pair of counter-rotating streamwise vortices. Hot-wire measurements detailed the velocity, time-averaged vorticity (Ωx) and small-scale turbulence features in the three-dimensional space downstream of the tabs. The small-scale structur

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