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Relevant bibliographies by topics / Automation; Fluid behavior; Flow

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Academic literature on the topic 'Automation; Fluid behavior; Flow'

Author: Grafiati

Published: 4 June 2021

Last updated: 9 February 2022

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Journal articles on the topic "Automation; Fluid behavior; Flow"

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Janocha, H., B. Rech, and R. Bölter. "PRACTICE-RELEVANT ASPECTS OF CONSTRUCTING ER FLUID ACTUATORS." International Journal of Modern Physics B 10, no. 23n24 (October 30, 1996): 3243–55. http://dx.doi.org/10.1142/s0217979296001690.

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The flow resistance of electrorheological fluids (ER fluids) can be controlled by applying electric fields. Thus, ER fluids are suitable for the application in actuators, using high-voltage sources for the generation of the field. The behaviour of an ER fluid actuator not only depends on the properties of the individual actuator components (ER fluid, energy transducer and energy source) but especially on their combined efforts as a system. Based on a possible scheme for the design of ER fluid actuators, this paper presents important practice-relevant aspects of a systematic actuator construction. Here the behaviour of a commercial ER suspension is examined and compared to a homogeneous ER fluid without yield point using a rotational viscometer and a flow-mode damper realized at the Laboratory of Process Automation (LPA) of the University of Saarland.

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Jinasena, Asanthi, and Roshan Sharma. "Estimation of Mud Losses during the Removal of Drill Cuttings in Oil Drilling." SPE Journal 25, no. 05 (June 18, 2020): 2162–77. http://dx.doi.org/10.2118/201230-pa.

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Summary Quantification of fluid losses at the topside is beneficial for early kick-loss detection and automation of the drilling operation. A model-based estimator is a useful tool for this purpose. The real-time estimation of the amount of fluid losses with the cuttings removal could significantly help in this regard, especially for kick detection and automation. However, to the authors’ knowledge, there is no published literature on such attempts. Therefore, a simple dynamic mathematical model of the complete closed-loop oil-well drilling system is developed in this study for estimation of the fluid losses during the removal of drill cuttings at the topside, as well as for monitoring the flow of return fluid during drilling. Furthermore, this model could provide information about the topside fluid-flow rates and fluid losses to other monitoring systems, such as kick- and loss-detection systems and automation systems. The model is used to estimate both the mud-pit level and the fluid losses during the removal of the drill cuttings through the solids-removal equipment. The model-order reduction of the flowline model using orthogonal collocation allows the model to be used in real-time estimations and/or with control systems. It is simple, easy to implement, and, more importantly, shows the necessary dynamic behavior of both the bottomside and topside of a drilling operation simultaneously. The topside model can be used together with bottomside models of varying complexity to estimate both the bottomhole pressure and the fluid losses through the solids-removal system.

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Junchangpood, Aphaiwong. "Study on Dynamic Characteristics of DC Valve in Electro-Hydraulic System Using CFD Simulation." Applied Mechanics and Materials 619 (August 2014): 278–82. http://dx.doi.org/10.4028/www.scientific.net/amm.619.278.

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The development of an intelligence control system has presently been widely studied for application in areas of automation industries, especially an electro-hydraulic system (EHS). Usually, it has the position, force and speed controls which are sensitive to change in the system parameters. Hence, a multi-input multi-output (MIMO) fuzzy controller has recently been proposed to control those parameters in a complex system. However, a mathematical model of the EHS which included the dynamic parameters has not yet been clarified. The objective of this paper is to analyze numerically the dynamic characteristics of the directional control valve (DCV) and also the flow behaviors in the electro-hydraulic system control. The spool displacements of 4/3 hydraulic closed center DCV and flow-pressure coefficient were simulated with the computational fluid dynamics (CFD). Furthermore, this paper presents CFD results, which explain the flow behaviors related with the dynamic characteristics of flow-pressure coefficient. The simulation results show that those coefficients show non-linear correlation with the opening spool displacements.

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Price, Morgan, John Lee, Azadeh Dinparastdjadid, Heishiro Toyoda, and Joshua Domeyer. "Effect of Automation Instructions and Vehicle Control Algorithms on Eye Behavior in Highly Automated Vehicles." International Journal of Automotive Engineering 10, no. 1 (2019): 73–79. http://dx.doi.org/10.20485/jsaeijae.10.1_73.

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DinparastDjadid, Azadeh, John D. Lee, Chris Schwarz, Vindhya Venkatraman, Timothy L. Brown, John Gasper, and Pujitha Gunaratne. "After Vehicle Automation Fails: Analysis of Driver Steering Behavior after a Sudden Deactivation of Control." International Journal of Automotive Engineering 9, no. 4 (2018): 208–14. http://dx.doi.org/10.20485/jsaeijae.9.4_208.

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Mazur-Milecka, Magdalena, Jacek Ruminski, Wojciech Glac, and Natalia Glowacka. "Detection and Model of Thermal Traces Left after Aggressive Behavior of Laboratory Rodents." Applied Sciences 11, no. 14 (July 20, 2021): 6644. http://dx.doi.org/10.3390/app11146644.

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Automation of complex social behavior analysis of experimental animals would allow for faster, more accurate and reliable research results in many biological, pharmacological, and medical fields. However, there are behaviors that are not only difficult to detect for the computer, but also for the human observer. Here, we present an analysis of the method for identifying aggressive behavior in thermal images by detecting traces of saliva left on the animals’ fur after a bite, nape attack, or grooming. We have checked the detection capabilities using simulations of social test conditions inspired by real observations and measurements. Detection of simulated traces different in size and temperature on single original frame revealed the dependence of the parameters of commonly used corner detectors (R score, ranking) on the parameters of the traces. We have also simulated temperature of saliva changes in time and proved that the detection time does not affect the correctness of the approximation of the observed process. Furthermore, tracking the dynamics of temperature changes of these traces allows to conclude about the exact moment of the aggressive action. In conclusion, the proposed algorithm together with thermal imaging provides additional data necessary to automate the analysis of social behavior in rodents.

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Sun, Quan, Tao Tang, Hongfeng Chai, Jie Wu, and Yang Chen. "Boosting Fraud Detection in Mobile Payment with Prior Knowledge." Applied Sciences 11, no. 10 (May 11, 2021): 4347. http://dx.doi.org/10.3390/app11104347.

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With the prevalence of mobile e-commerce, fraudulent transactions conducted by robots are becoming increasingly common in mobile payments, which is severely undermining market fairness and resulting in financial losses. It has become a difficult problem for mobile applications to identify robotic automation accurately and efficiently from a massive number of transactions. The current research does not propose any effective method or engineering implementation. In this article, an extension to boost algorithms is presented that permits the incorporation of prior human knowledge as a means of compensating for a training data shortage and improving prediction results. Prior human knowledge is accumulated from historical fraud transactions or transferred from different domains in the form of expert rules and blacklists. The knowledge is applied to extract risk features from transaction data, risk features together with normal features are input into the boosting algorithm to perform training, and therefore we incorporate boosting algorithm with prior human knowledge to improve the performance of the model. For the first time we verified the effectiveness of the method via a widely deployed mobile APP with 150+ million users, and by taking experiments on a certain dataset, the extended boosting model shows an accuracy increase from 0.9825 to 0.9871 and a recall rate increase from 0.888 to 0.948. We also investigated feature differences between robots and normal users and we discovered the behavior patterns of robotic automation that include less spatial motion detected by device sensors (1/10 of normal user pattern), higher IP group-clustering ratio (60% in robots vs. 15% in normal users), higher jailbroken device rate (92.47% vs. 4.64%), more irregular device names and fewer IP address changes. The quantitative analysis result is helpful for APP developers and service providers to understand and prevent fraudulent transactions from robotic automation.This article proposed an optimized boosting model, which has better use in the field of robotic automation detection of mobile phones. By combining prior knowledge and feature importance analysis, the model is more robust when the actual dataset is unbalanced or with few-short samples. The model is also more explainable as feature analysis is available which can be used for generating disposal rules in the actual fake mobile user blocking systems.

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Iqbal, Umair, Johan Barthelemy, Wanqing Li, and Pascal Perez. "Automating Visual Blockage Classification of Culverts with Deep Learning." Applied Sciences 11, no. 16 (August 18, 2021): 7561. http://dx.doi.org/10.3390/app11167561.

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Blockage of culverts by transported debris materials is reported as the salient contributor in originating urban flash floods. Conventional hydraulic modeling approaches had no success in addressing the problem primarily because of the unavailability of peak floods hydraulic data and the highly non-linear behavior of debris at the culvert. This article explores a new dimension to investigate the issue by proposing the use of intelligent video analytics (IVA) algorithms for extracting blockage related information. The presented research aims to automate the process of manual visual blockage classification of culverts from a maintenance perspective by remotely applying deep learning models. The potential of using existing convolutional neural network (CNN) algorithms (i.e., DarkNet53, DenseNet121, InceptionResNetV2, InceptionV3, MobileNet, ResNet50, VGG16, EfficientNetB3, NASNet) is investigated over a dataset from three different sources (i.e., images of culvert openings and blockage (ICOB), visual hydrology-lab dataset (VHD), synthetic images of culverts (SIC)) to predict the blockage in a given image. Models were evaluated based on their performance on the test dataset (i.e., accuracy, loss, precision, recall, F1 score, Jaccard Index, region of convergence (ROC) curve), floating point operations per second (FLOPs) and response times to process a single test instance. Furthermore, the performance of deep learning models was benchmarked against conventional machine learning algorithms (i.e., SVM, RF, xgboost). In addition, the idea of classifying deep visual features extracted by CNN models (i.e., ResNet50, MobileNet) using conventional machine learning approaches was also implemented in this article. From the results, NASNet was reported most efficient in classifying the blockage images with the 5-fold accuracy of 85%; however, MobileNet was recommended for the hardware implementation because of its improved response time with 5-fold accuracy comparable to NASNet (i.e., 78%). Comparable performance to standard CNN models was achieved for the case where deep visual features were classified using conventional machine learning approaches. False negative (FN) instances, false positive (FP) instances and CNN layers activation suggested that background noise and oversimplified labelling criteria were two contributing factors in the degraded performance of existing CNN algorithms. A framework for partial automation of the visual blockage classification process was proposed, given that none of the existing models was able to achieve high enough accuracy to completely automate the manual process. In addition, a detection-classification pipeline with higher blockage classification accuracy (i.e., 94%) has been proposed as a potential future direction for practical implementation.

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Korobko, Ivan, Anna Pysarets, and Andrii Misiats. "RESEARCH AUTOMATION OF FLUID FLOW TRANSDUCERS DYNAMIC CHARACTERISTICS." Bulletin of Kyiv Polytechnic Institute. Series Instrument Making, no. 56(2) (December 20, 2018): 91–96. http://dx.doi.org/10.20535/1970.56(2).2018.152457.

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Pacheco Quiñones, Daniel, Maria Paterna, and Carlo De Benedictis. "Automatic Electromechanical Perturbator for Postural Control Analysis Based on Model Predictive Control." Applied Sciences 11, no. 9 (April 29, 2021): 4090. http://dx.doi.org/10.3390/app11094090.

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Objective clinical analyses are required to evaluate balance control performance. To this outcome, it is relevant to study experimental protocols and to develop devices that can provide reliable information about the ability of a subject to maintain balance. Whereas most of the applications available in the literature and on the market involve shifting and tilting of the base of support, the system presented in this paper is based on the direct application of an impulsive (short-lasting) force by means of an electromechanical device (named automatic perturbator). The control of such stimulation is rather complex since it requires high dynamics and accuracy. Moreover, the occurrence of several non-linearities, mainly related to the human–machine interaction, signals the necessity for robust control in order to achieve the essential repeatability and reliability. A linear electric motor, in combination with Model Predictive Control, was used to develop an automatic perturbator prototype. A test bench, supported by model simulations, was developed to test the architecture of the perturbation device. The performance of the control logic has been optimized by iterative tuning of the controller parameters, and the resulting behavior of the automatic perturbator is presented.

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Dissertations / Theses on the topic "Automation; Fluid behavior; Flow"

1

Love, Peter John. "Three dimensional lattice gas models for amphiphilic fluids." Thesis, University of Oxford, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365431.

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Johansson, Ann. "Video Games Fluid Flow Simulations Towards Automation : Smoothed Particle Hydrodynamics." Thesis, Uppsala universitet, Avdelningen för beräkningsvetenskap, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-219951.

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A complete understanding of the cooling process when hot rolling steel is essential to understanding how the quality of the steel is connected to the cooling. This is why it is of great interest to simulate this process. However traditional CFD methods are too expensive in terms of CPU time. Knowing that video games successfully simulate fluids in reasonable time, those methods could be useful for simulating the cooling process in steel manufacturing. This would mean a loss in accuracy that could be acceptable. In this thesis different methods used for fluid simulations have been studied. The Smoothed Particle Hydrodynamics (SPH) method has been chosen. The method has been implemented for simulating the cooling process in MATLAB, which is a matrix operation based programming tool. Convincing results have been achieved for a big scale, but problems still remain for an implementation on a small scale.

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Thornhill, Lindsey Dorough. "Fatigue behavior of flexhoses and bellows due to flow-induced vibrations." Thesis, Georgia Institute of Technology, 1986. http://hdl.handle.net/1853/17624.

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Yurko, James Andrew 1975. "Fluid flow behavior of semi-solid aluminum at high shear rates." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/8451.

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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2001.
"June 2001."
Includes bibliographical references (leaves 119-127).
The rheological behavior and microstructure of semi-solid aluminum alloys were studied using a novel apparatus, the Drop Forge Viscometer (DFV). The viscometer determines force from the curvature of displacement data allowing calculations of viscosities at shear rates in excess of 1000 s-1. Alternatively, the DFV can be operated like a conventional parallel-plate compression viscometer, attaining shear rates as low as 10-5 s-1. Durations of an experiment range between approximately 5 ms and 24 hours. Most rapid compression tests resulted in periods of first rapidly increasing shear rate followed by rapidly decreasing shear rate. Viscosity during the increasing shear rate period decreased by 1-2 orders of magnitude. The viscosity during the decreasing shear rate was an order of magnitude smaller (relative to another experiment) when it achieved a 75% greater maximum shear rate. The DFV was used to calculate viscosity as a function of shear rate for Al-Si and Al-Cu alloys that were rheocast with the commercial SIMA and MHD processes, as well as the recently developed MIT method. Experiments were conducted between fractions solid of 0.44 and 0.67. Viscosity of A357 produced by the three processing routes all had similar viscosities, ranging from 300 Pas at 120 s-1 to 2.2 Pas at 1500 s-1. The final height of compressed Al-Cu was always greater than Al-Si for a given set of experimental conditions. Segregation was not observed in rapid compression experiments shorter than 10 ms, either visually or with EDS characterization. At low compression velocities, segregation was observed and increased with the amount of strain.
by James Andrew Yurko.
Ph.D.

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Thompson, Willis Hope III. "Numerical Analysis of Thermal Behavior and Fluid Flow in Geothermal Energy Piles." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/24013.

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Geothermal heat exchangers are a growing energy technology that improve the energy efficiency of heating and cooling systems in buildings. Vertical borehole heat exchangers (BHE) coupled with ground source heat pumps have been widely developed and researched in the past century. The major disadvantage of BHEs is the initial capital cost required to drill the boreholes. Geothermal energy piles (GEP) were developed to help offset the high initial cost of these systems. A GEP combines ground source heat pump technology with deep earth structural foundations of buildings. GEPs are relatively new technology and robust standards and guidelines have not yet been developed for the design of these systems. The main operational difference between GEPs and conventional BHEs is the length and diameter of the below ground heat exchangers. The diameter of a GEP is much larger and the length is typically shorter than BHEs. Computational fluid dynamics (CFD) analysis is used in this study to investigate and better understand how structural piles perform as geothermal heat exchangers. The CFD analysis is used to simulate an existing experimental energy pile test. The experimental test is modeled as built including fluid modeling to provide additional detail into the behavior of the circulation fluid within the pile. Two comparisons of large diameter GEPs are made using CFD analysis to gain knowledge of the effects of varying pile diameter and loop configuration. The thermal response test was successfully modeled using the CFD model. The CFD results closely match the results of the field test. The large diameter comparisons show that the performance of an energy pile will increase as the diameter increases with a constant loop density. Multiple numbers of loops were tested in a constant diameter pile and the results show that with symmetrically placed loops the performance will increase with a greater number of loops in the pile.
Master of Science

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Albrecht, Karen A. "Observation scale effects on fluid transport behavior of soil." Thesis, Virginia Tech, 1985. http://hdl.handle.net/10919/43037.

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Variabilities of hydraulic and solute transport properties of soil are examined at three scales: pore-scale, sample volume-scale, and field-scale. Undisturbed soil cores were taken at 19 subsites spaced logarithmically along a 150 m line transect in a Groseclose mapping unit near Blacksburg; Virginia. Three core sizes were taken at each subsite at the soil surface and 0.5 m depth. 'Small' cores were-40x54 mm; 'medium' cores were 60X100 mm; and 'large' cores were 100x150 mm. Macropore effects on solute transport were evaluated using monocontinuum and bicontinuum models. Bicontinuum-predicted solute breakthrough curves (BTC) closely agreed with observed BTC data with mean errors of reduced concentrations
Master of Science

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Kwon, Ronald Young. "Mechanical behavior and early molecular signaling during mechanotransduction of fluid flow in bone cells /." May be available electronically:, 2008. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.

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Fu, An. "Investigation of Fluid Wicking Behavior in Micro-Channels and Porous Media by Direct Numerical Simulation." University of Cincinnati / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1563272437544414.

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Ogbuagu, Too-chukwu C. "Numerical Investigation of the Near FieldZone Flow Behavior of Isothermal CornerImpinging Jet Ventilation Using CFD." Thesis, Högskolan i Gävle, Avdelningen för byggnadsteknik, energisystem och miljövetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-35982.

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Abstract The impinging jet ventilation's importance in providing better air distribution and energy-efficient operation, as well as both its heating and cooling flexibility potential cannot be overemphasized. This is because acceptable indoor air quality and its environmental conditions are essential to occupant’s wellbeing, comfort, productivity, and improved cognitive function. Poor air quality conditions could result in sick building symptoms (SBS) and several studies have investigated that the prevalence of sick building symptoms is associated with indoor air quality. Consequently, to the need for high ventilation effectiveness, the impinging jet ventilation system has been developed and applied in different types of buildings as a new ventilation strategy and concept within the last two decades. Therefore, it is important to continuously develop inventive air distribution systems such as IJV with a better location and terminal configuration of the supply device to adequately provide an acceptable indoor environment in an energy-efficient manner. This study aims at reaching a comprehensive understanding of the near field zone of an isothermal turbulent corner impinging jet in a room by using computational fluid dynamics (CFD) simulation tool. Thus, directly investigating the flow field involving the velocity magnitude, velocity decay, and spreading rate along the diagonal of the room.The cases carried out consist of 12 different three-dimensional modeled configurations (room) of the computational domain with the dimension 7.0 (L) x 7.0 (W) x 2.67 (H) m. The cases which comprised different aspects of diffuser geometry (triangle, quadrant, square), diffuser area, discharge height, and flow rates, used the RNG k-ε turbulence model to solve the turbulence flow.The result obtained, from the parametric study in all the cases was detailed to analyze the effect of the different flow rate, discharge heights, diffuser geometry, and its area on the velocity profile development, velocity decay, and spreading rate along the diagonal of the room. This study significantly shows the triangular geometries having greater velocity magnitude and velocity decay along all the line profile positions. Interestingly, a comparison between the quadrant and square geometry illustrates that their characteristics of generating a greater velocity magnitude depend on its discharge height. The result also demonstrated a decrease in jet velocity decay with an increase in jet discharge height. With similar jet spread at higher jet discharge, the square geometry exhibited a higher spreading rate at lower discharge height.

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Freedland, Graham. "Investigation of Jet Dynamics in Cross-Flow: Quantifying Volcanic Plume Behavior." PDXScholar, 2016. http://pdxscholar.library.pdx.edu/open_access_etds/3314.

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Volcanic eruption columns inject high concentrations of ash into the atmosphere. Some of this ash is carried downwind forming ash clouds in the atmosphere that are hazardous for private and commercial aviation. Current models rely on inputs such as plume height, duration, eruption rate, and meteorological wind fields. Eruption rate is estimated from plume height using relations that depend on the rate of air entrainment into the plume, which is not well quantified. A wind tunnel experiment has been designed to investigate these models by injecting a vertical air jet into a cross-flow. The ratio of the cross-flow and jet velocities is varied to simulate a weak plume, and flow response is measured using particle image velocimetry. The plumes are characterized and flow data relative to the centerline is examined to measure the growth of weak plumes and the entrainment velocity along its trajectory. It was found that cross-flow recirculates behind the jet and entrainment occurs both up and downstream of the jet. Analysis of the generation of turbulence enhanced results by identifying the transition point to bending plume and the growth of the shear layer in a bending plume. This provides information that can be used to improve models of volcanic ash concentration changes in the atmosphere.

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Books on the topic "Automation; Fluid behavior; Flow"

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Hewitt, G. F. (Geoffrey Frederick) and Alimonti Claudio, eds. Multiphase flow metering. Amsterdam: Elsevier, 2010.

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Feireisl, Eduard. Asymptotic behavior of dynamical systems in fluid mechanics. Springfield, Mo: American Institute of Mathematical Sciences, 2010.

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Unsteady-state fluid flow: Analysis and applications to petroleum reservoir behavior. Amsterdam: Elsevier, 1999.

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Dietmar, Schulze. Powders and bulk solids: Behavior, characterization, storage and flow. Berlin: Springer, 2008.

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Elazar, Yekutiel. A mapping of the viscous flow behavior in a controlled diffusion compressor cascade using laser doppler velocimetry and preliminary evaluation of codes for the prediction of stall. Monterey, California: Naval Postgraduate School, 1988.

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Workshop on Two-Phase Fluid Behavior in a Space Environment (1988 Ocean City, Md.). Workshop on Two-Phase Fluid Behavior in a Space Environment: Proceedings of a workshop sponsored by the National Aeronautics and Space Administration, Washington, D.C., and held in Ocean City, Maryland, June 13-14, 1988. Washington, D.C: NASA, Office of Management, Scientific and Technical Information Division, 1989.

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Workshop, on Two-Phase Fluid Behavior in a. Space Environment (1988 Ocean City Md ). Workshop on Two-Phase Fluid Behavior in a Space Environment: Proceedings of a workshop sponsored by the National Aeronautics and Space Administration, Washington, D.C., and held in Ocean City, Maryland, June 13-14, 1988. [Washington, DC]: National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division, 1989.

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Swanson, Theodore D. Workshop on Two-phase Fluid Behavior in a Space Environment: Proceedings of a workshop sponsored by the National Aeronautics and Space Administration, Washington, D.C., and held in Ocean City, Maryland, June 13-14, 1988. Greenbelt, Md: Goddard Space Flight Center, 1989.

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Ling, Tien-Feng Tyrone. Surface properties and flow behavior of foams in relation to fluid displacement in porous media. 1987.

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Ling, Tien-Feng Tyrone. Surface properties and flow behavior of foams in relation to fluid displacement in porous media. 1987.

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Book chapters on the topic "Automation; Fluid behavior; Flow"

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Tewari, Raj Deo, Abhijit Y. Dandekar, and Jaime Moreno Ortiz. "Flow Assurance in EOR Design and Operation 1." In Petroleum Fluid Phase Behavior, 313–53. First edition. | Boca Raton, FL : CRC Press/Taylor & Francis Group, 2019. | Series: Emerging trends & technologies in petroleum engineering: CRC Press, 2018. http://dx.doi.org/10.1201/9781315228808-10.

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Yahya, S. M., S. F. Anwer, S. Sanghi, and N. Hasan. "Peculiar Behavior of Thermally Stratified Channel Flow Under Non-Boussinesq Condition." In Fluid Mechanics and Fluid Power – Contemporary Research, 679–86. New Delhi: Springer India, 2016. http://dx.doi.org/10.1007/978-81-322-2743-4_65.

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Zhou, Q., and N. S. Cheng. "Particle Settling Behavior in Turbulent Flow Generated by Oscillating Grid." In New Trends in Fluid Mechanics Research, 142–45. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-75995-9_36.

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Lasiecka, Irena, and Justin T. Webster. "Flow-plate interactions: well-posedness and long time behavior." In Mathematical Theory of Evolutionary Fluid-Flow Structure Interactions, 173–268. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-92783-1_3.

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Fehrs, Michael, Sebastian Helm, Christoph Kaiser, and Thomas Klimmek. "Aeroelastic Behavior of a Laminar Wing in Transonic Flow." In Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 164–73. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-79561-0_16.

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Engelder, Terry, and Christopher H. Scholz. "Fluid Flow Along Very Smooth Joints at Effective Pressures Up to 200 Megapascals." In Mechanical Behavior of Crustal Rocks, 147–52. Washington, D. C.: American Geophysical Union, 2013. http://dx.doi.org/10.1029/gm024p0147.

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Leonavičienė, T., and K. Pileckas. "Asymptotic Behavior at Infinity of Exterior Three-dimensional Steady Compressible Flow." In Contributions to Current Challenges in Mathematical Fluid Mechanics, 125–51. Basel: Birkhäuser Basel, 2004. http://dx.doi.org/10.1007/978-3-0348-7877-7_5.

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Galdi, Giovanni Paolo. "Existence, Uniqueness, and Asymptotic Behavior of Regular Time-Periodic Viscous Flow Around a Moving Body." In Advances in Mathematical Fluid Mechanics, 109–26. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-68144-9_4.

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Tabata, Masahisa. "Numerical Simulation of the Behavior of a Rising Bubble by an Energy-Stable Lagrange-Galerkin Scheme." In Advances in Computational Fluid-Structure Interaction and Flow Simulation, 129–38. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-40827-9_10.

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Ando, J., C. Ishikawa, T. Komatsuda, and A. Kamiya. "The Effect of Fluid Shear Stress on the Growth Behavior of Vascular Endothelial Cells in vitro." In Role of Blood Flow in Atherogenesis, 195–200. Tokyo: Springer Japan, 1988. http://dx.doi.org/10.1007/978-4-431-68399-5_29.

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Conference papers on the topic "Automation; Fluid behavior; Flow"

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Szpak, Rodrigo, and Max Hering de Queiroz. "Design and Implementation of Supervisory Control for an Electropneumatic Station Subject to Faults in Material Flow." In 9th FPNI Ph.D. Symposium on Fluid Power. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/fpni2016-1542.

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Human intervention in automated manufacturing systems may result in faults in material flow leading to incoherent behavior of the control system. Particularly when multiple workpieces can be operated concurrently, the design of a programmable logic controller (PLC) that can handle such nondeterministic events is a complex task that justifies the use of formal methods such as the Supervisory Control Theory (SCT). The main objective of this work is the use of SCT for the systematic design of the automation system of an electro-pneumatic station of a Modular Production System prone to faults in the material flow. A code generation tool has been used to translate the modular supervisors into an IEC61131 PLC program, whose automata-based structure has been exploited by several functionalities of a SCADA System. The implementation of supervisory control allows the station to flexibly process five workpieces simultaneously, with conformance to functional requirements and with safety to deal with the nondeterministic removal of workpieces along the station.

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Luna, J. M., S. Hernandez-Guerrero, C. Rubio-Arana, and R. H. Chavez. "Transient Analysis of the Thermal and Hydraulic Behavior of a Cooling Fluid in a Bayonet Tube." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-16265.

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Analysis of forced convection in transient fluid flows have recently gathered attention due to the development of automatic control devices for precision control of the fluid flow in heat transfer devices of high efficiency. The precise regulation of the fluid flow is very important when the control of heat exchangers has to be assured, thus requiring a better understanding and a precise evaluation of the transient heat behavior. With few exceptions, the calculus methods for the heat exchangers devices are based on the flow patterns using considerations that could be apart from reality and restricted to stationary state conditions. These methods give little information on the possible variations due to the fluid flow changes and temperature distribution that arise due to thermal stresses. This paper deals with the details of a numerical approach to describe the transient hydrodynamic and thermal behavior in a bayonet tube with a fixed geometry using water as the working fluid. The results are reported as a function of the dimensionless Reynolds, Euler and Nusselt numbers. For each zone of the bayonet tube the time required for the fluid flow to be hydro and thermally developed is determined. The effect of the hydrodynamic flow changes on the heat flow local distribution is discussed. For a given Reynolds number a separation vortex is detected in the returning zone and it changes its position as time elapses. It is found that as time approaches the steady state the heat transfer becomes more stable throughout the bayonet.

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Mehta, Akshan Paresh, Ganesh Ram Ramanujam Karthikeyan, Kalaichelvi Venkatesan, and Karthikeyan Ramanujam. "Neural Predictive Controller for Hydraulic Power Transmission in Wind Turbine." In ASME 2014 Gas Turbine India Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gtindia2014-8293.

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Fluid power transmission for wind turbines is quietly gaining more interest. The aerodynamic torque of the rotor blades is converted into a pressurized fluid flow by means of a positive displacement pump. At the other end of the fluid power circuit, the pressurized flow is converted back to torque and speed by a hydraulic motor. The goal of this paper is to develop a general dynamic model of a fluid power transmission for wind turbines, in order to gain better insight on the dynamic behavior and to explore the influence of the main design parameters. A fluid power transmission is modeled for a wind turbine with 1MW rated power capacity. This mathematical model can be used for simulation of the process using AUTOMATION STUDIO 5.2. Further the model has been approximated as a transfer function model using system identification toolbox available in MATLAB software. Neural network based predictive control (NPC) is applied to the mid-sized hydrostatic wind turbine model for maximizing power capture. The effectiveness of NPC is compared with PI controller.

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Cerri, Giovanni, Laila Chennaoui, Ambra Giovannelli, and Mauro Miglioli. "Further Developments of a Variable Fuel Flow Automatic Mixing Valve for Prescribed Injection Ratio." In ASME Turbo Expo 2009: Power for Land, Sea, and Air. ASMEDC, 2009. http://dx.doi.org/10.1115/gt2009-59035.

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The production of an emulsion by emulsification plant without the addition of chemical additives always requires an injection device of the dispersed phase (water or ethanol) into the continuous phase (fuel oil). In this way, a preliminary mixture of immiscible liquids is produced at the right volume ratio. Such a mixture is processed downstream to have an emulsion with the dispersed phase drop mean diameters less than 4 μm. Since Gas Turbines have a variable fuel flow related to the delivered power, there is the necessity of maintaining a prescribed dispersed phase to continuous phase volumetric ratio when the fuel flow varies. This paper deals with an automatic device that is capable of producing the prescribed injection ratio of the dispersed phase into the fuel oil when the fuel oil flow rate changes. Such a device is developed to be coupled with an emulsification system that provides to break an immiscible part of fluid in a very small drops. The system is for feeding fuel into engines (S.I. Gasoline, Diesel, Gas Turbine combustors) operating at variable loadings i.e variable liquid fuel flow. The mixer (PMD, Pre-Mixer Device) has been presented at ASME Turbo Expo (Montreal 2007) for diesel #2 operating at 25°C with the viscosity being assumed as constant because of its variation is in a reduced range. In this paper, different fuels having different viscosities (diesel oil of different numbers, rapeseed oil, sunflower oil, etc) have been tested. The major modeling aspect concerns with the behavior of the annular orifice that produces a membrane displacement. A bibliographic analysis has been performed and the main results are reported in this paper. Since the architecture of the orifice, its geometry and the flow conditions were not reported in the bibliography, systematic experiments have been performed. Such experiments have been carried on for various liquids having various viscosities for different geometric arrangements and force acting on the membrane. The analysis of results led to formulate models to describe both the discharge flow and effective force coefficients. The paper gives a complete outlook of the experiments and of the above models. The viscosity dependent models have been introduced in to the PMD simulation code. Such models that take the influence of viscosity into account have been developed and some scale-up rules have been established. An amply description of the sizing and scale-up models is presented together with modifications to improve the prototype behavior operated with fluids having different viscosities. Experimental results concerning the influence of viscosity of the continuous phase are presented and widely discussed taking the model as reference.

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Mahmoud, Ahmed M., Phoebe A. Stapleton, Jefferson C. Frisbee, and Osama M. Mukdadi. "Noninvasive Measurement of Brachial Wall Mechanics During Flow-Mediated Vasodilation Using 2D Ultrasound Strain Tensor Imaging." In ASME 2008 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2008. http://dx.doi.org/10.1115/sbc2008-192837.

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Atherosclerosis has become one of the contributing factors of cardiovascular diseases. Endothelial dysfunction is considered a key factor in the development of atherosclerosis [1]. Flow-mediated vasodilatation (FMD) measurement in brachial and other conduit arteries has become a common method to asses the endothelial function in vivo [2]. Fluid shear-stress increases due to blood flow increases, thus stimulating endothelial cell production and release of nitric oxide, a potent endogenous vasodilator. The mechanical behavior of the arterial wall during vasodilatation is considered an indication for endothelial health. In FMD measurement, the endothelium-dependent variation in arterial diameter in response to reactive ischemia-induced hyperemia is measured by comparing the luminal diameter of the brachial artery before and after the ischemia of the forearm induced by pressurizing a cuff [3]. Ultrasound imaging modalities has been widely used in the FMD analysis as a noninvasive low-cost tool, which can be used to track the arterial diameter change with time. Most of the FMD measurements in the literature are based on tracing the vessel wall boundary manually. Since this process is time consuming and may introduce human errors, automatic measurement techniques have been implemented [3,4]. These techniques utilize image processing algorithms to identify the edges of arterial walls, and then calculate the relative displacement change with time.

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Lu, Daogang, Yuhao Zhang, Zhongyi Wang, Guanghao Wu, and Qiong Cao. "Experimental Investigation on the Thermal and Flow Characteristics in the IRWST Under Spraying of the Steam From Automatic Depressurization System in AP1000 Plant." In 2016 24th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/icone24-60416.

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In AP1000 plant, the automatic depressurization system (ADS) works to discharge the high-temperature and high-pressure steam from the Reactor Coolant System (RCS) primary side to the In-containment Refueling Water Storage Tank (IRWST) in the LOCA conditions. In particular, for the AP1000 plant, both the IRWST and ADS spargers are specially designed, and the ADS spargers are located in one corner of the IRWST. All the factors lead to the special and complicated thermal and flow behavior in the IRWST, which in turn have great influences on the condensation effects of the ejected steam. In the present work, an overall scaled-down IRWST and ADS sparger models are built to study the condensation and mixing phenomena in the accidental depressurization events in AP1000. Thermocouples matrix with more than 200 T-type sheathed thermocouples are utilized to measure the three dimensional temperature in the large tank. The Particle Image Velocimetry (PIV) is employed for the measurement of the natural convection flow velocity. Based on the experimental data, the local spraying flow patterns, flow behavior, and thermal stratification phenomena in IRWST etc. are analyzed. The results indicate that the spraying steam condensation flow patterns are closely related to the subcooling degree in the IRWST. In addition, the stratification number is developed to evaluate the thermal stratification extent in the IRWST, which indicates that only part of the fluid are used efficiently for condensing the spraying steam directly.

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Popescu, Mihaela. "Behavior of Flow-Induced Vibration in Corrugated Pipes." In 20th AIAA Computational Fluid Dynamics Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2011. http://dx.doi.org/10.2514/6.2011-3395.

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Meade, L., S. Pothier, C. Rogers, D. Parekh, L. Meade, S. Pothier, C. Rogers, and D. Parekh. "An investigation of particle behavior in a compressible, impinging jet flow." In 28th Fluid Dynamics Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1997. http://dx.doi.org/10.2514/6.1997-1994.

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Ouadoud, A., and O. Benmahjoub. "THERMOELASTOHYDRODYNAMIC BEHAVIOR OF A JOURNAL BEARING WITH TURBULENT FLOW." In Topical Problems of Fluid Mechanics 2019. Institute of Thermomechanics, AS CR, v.v.i., 2019. http://dx.doi.org/10.14311/tpfm.2019.025.

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Amitay, Michael, Anthony Washburn, Scott Anders, Ari Glezer, and David Parekh. "Active Flow Control on the STINGRAY UAV: Transient Behavior." In 33rd AIAA Fluid Dynamics Conference and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2003. http://dx.doi.org/10.2514/6.2003-4001.

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Reports on the topic "Automation; Fluid behavior; Flow"

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Taylor, Oliver-Denzil, Amy Cunningham,, Robert Walker, Mihan McKenna, Kathryn Martin, and Pamela Kinnebrew. The behaviour of near-surface soils through ultrasonic near-surface inundation testing. Engineer Research and Development Center (U.S.), September 2021. http://dx.doi.org/10.21079/11681/41826.

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Seismometers installed within the upper metre of the subsurface can experience significant variability in signal propagation and attenuation properties of observed arrivals due to meteorological events. For example, during rain events, both the time and frequency representations of observed seismic waveforms can be significantly altered, complicating potential automatic signal processing efforts. Historically, a lack of laboratory equipment to explicitly investigate the effects of active inundation on seismic wave properties in the near surface prevented recreation of the observed phenomena in a controlled environment. Presented herein is a new flow chamber designed specifically for near-surface seismic wave/fluid flow interaction phenomenology research, the ultrasonic near-surface inundation testing device and new vp-saturation and vs-saturation relationships due to the effects of matric suction on the soil fabric.

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Mahmood, S. M. Fluid flow behavior through rock-slab micromodels in relation to other micromodels. Office of Scientific and Technical Information (OSTI), June 1990. http://dx.doi.org/10.2172/6843917.

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