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Relevant bibliographies by topics / Flow visualization, Visualization techniques, Simulation

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Academic literature on the topic 'Flow visualization, Visualization techniques, Simulation'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Flow visualization, Visualization techniques, Simulation"

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Urban, Ondřej, Michaela Kurková, and Pavel Rudolf. "Application of Computer Graphics Flow Visualization Methods in Vortex Rope Investigations." Energies 14, no. 3 (January 26, 2021): 623. http://dx.doi.org/10.3390/en14030623.

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Computer graphics visualization techniques for application on data from Computational Fluid Dynamics (CFD) simulations of the vortex rope, a phenomenon present in hydraulic turbines operating in off-design conditions, were devised. This included not only objects for visualization (what to visualize) but also methods of the visualization itself (how to do it). By means of advanced methods based particularly on volume rendering of Eulerian fields in combination with Lagrangian objects, various phenomena were captured, such as the motion of the vortex rope or the backflow zone. The data came from simulations using a scale-resolving hybrid turbulence model, the Stress-Blended Eddy Simulation. In such detailed simulations and other applications involving complex three-dimensional structures, proper visualization methods are needed to leverage the content captured in the resultant data.

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Summers, Kenneth L., Thomas Preston Caudell, Kathryn Berkbigler, Brian Bush, Kei Davis, and Steve Smith. "Graph Visualization for the Analysis of the Structure and Dynamics of Extreme-Scale Supercomputers." Information Visualization 3, no. 3 (July 8, 2004): 209–22. http://dx.doi.org/10.1057/palgrave.ivs.9500079.

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We are exploring the development and application of information visualization techniques for the analysis of new massively parallel supercomputer architectures. Modern supercomputers typically comprise very large clusters of commodity SMPs interconnected by possibly dense and often non-standard networks. The scale, complexity, and inherent non-locality of the structure and dynamics of this hardware, and the operating systems and applications distributed over them, challenge traditional analysis methods. As part of the á la carte (A Los Alamos Computer Architecture Toolkit for Extreme-Scale Architecture Simulation) team at Los Alamos National Laboratory, who are simulating these new architectures, we are exploring advanced visualization techniques and creating tools to enhance analysis of these simulations with intuitive three-dimensional representations and interfaces. This work complements existing and emerging algorithmic analysis tools. In this paper, we give background on the problem domain, a description of a prototypical computer architecture of interest (on the order of 10,000 processors connected by a quaternary fat-tree communications network), and a presentation of three classes of visualizations that clearly display the switching fabric and the flow of information in the interconnecting network.

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Almohammadi, Khaled Mohammad. "Smooth Particle Hydrodynamic and URAN Visualization of Multiphase Flow." Defect and Diffusion Forum 399 (February 2020): 87–91. http://dx.doi.org/10.4028/www.scientific.net/ddf.399.87.

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Significant research is being conducted in the simulation of fluid flows due to the increase in employing the physics of the fluid flow to either commercial, in-house or open source codes. The analysis of the fluid flow is mainly based on the Lagrangian or the Eulerian approach. Many of the simulation codes employ the Eulerian approach due to its simplicity. These codes are based on several numerical techniques and yet few benchmarks have been conducted. However, the codes which employ the Lagrangian approach seem to be promising and may accurately simulate fluid flow phenomena. In this paper, a comparative analysis of the Lagrangian and Eulerian approach is investigated for a water droplet in a tank. The velocity field and the total pressure of the fluid are generated for the simulation by employing Ansys Fluent for the Eulerian approach and DualPhysics for the Lagrangian approach. The fluid structure and the fluid flow development are compared in order to assess the capability of each approaches in analysing the investigated fluid flow. This study may play a significant role on the importance of employing the Lagrangian approach for fluid flows where complex fluid structure occurs.

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Jiao, Yun, and Chengpeng Wang. "Visualization of separation and reattachment in an incident shock-induced interaction." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 235, no. 12 (March 11, 2021): 1706–16. http://dx.doi.org/10.1177/0954410020983495.

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An experimental study is conducted on the qualitative visualization of the flow field in separation and reattachment flows induced by an incident shock interaction by several techniques including shear-sensitive liquid crystal coating (SSLCC), oil flow, schlieren, and numerical simulation. The incident shock wave is generated by a wedge in a Mach 2.7 duct flow, where the strength of the interaction is varied from weak to moderate by changing the angle of attack α of the wedge from 8° and 10° to 12°. The stagnation pressure upstream was set to approximately 607.9 kPa. The SSLCC technique was used to visualize the surface flow characteristics and analyze the surface shear stress fields induced by the initial incident shock wave over the bottom wall and sidewall experimentally which resolution is 3500 × 200 pixels, and the numerical simulation was also performed as the supplement for a clearer understanding to the flow field. As a result, surface shear stress over the bottom wall was visualized qualitatively by SSLCC images, and flow features such as separation/reattachment and the variations of position/size of separation bubble with wedge angle were successfully distinguished. Furthermore, analysis of shear stress trend over the bottom wall by a hue value curve indicated that the relative magnitude of shear stress increased significantly downstream of the separation bubble compared with that upstream. The variation trend of shear stress was consistent with the numerical simulation results, and the error of separation position was less than 2 mm. Finally, the three-dimensional schematic of incident shock-induced interaction has been achieved by qualitative summary by multiple techniques, including SSLCC, oil flow, schlieren, and numerical simulation.

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Banaś, Michał, Piotr Antoniak, Lubomir Marciniak, and Jarosław Stryczek. "Visualization of flow phenomena in hydraulic throttle valves of plastics." MATEC Web of Conferences 211 (2018): 19001. http://dx.doi.org/10.1051/matecconf/201821119001.

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Using elements made of plastics in hydraulic drives and controls encounters problems, for example related to strength. However, the advantage of solutions with plastics manifests itself, among others in possibility of shaping hydraulic elements in accordance with the assumed requirements. The use of additive manufacturing techniques allows us to make plastic parts with shapes that are unattainable for steel parts. The authors have attempted to determine the influence of the shape of the closing element on the phenomena of flow through the throttling gap in the hydraulic throttle valve. They chose three poppets of different shapes and carried out flow simulations using CFD. They compared simulation results in the form of flow velocity field in the valve chamber with observations obtained with the Particle Image Velocimetry (PIV) technique. In visualization tests, a throttle valve made of transparent materials and markers in a form of air bubbles were used. The tests confirmed the possibility of using air bubbles as markers of the PIV method at low pressure. The presented conclusions indicate the need for further modification of the shape of the closing element as well as of the design of the valve body.

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Rozmanov, Dmitri, Svetlana Baoukina, and D. Peter Tieleman. "Density based visualization for molecular simulation." Faraday Discuss. 169 (2014): 225–43. http://dx.doi.org/10.1039/c3fd00124e.

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Molecular visualization of structural information obtained from computer simulations is an important part of research work flow. A good visualization technique should be capable of eliminating redundant information and highlight important effects clarifying the key phenomena in the system. Current methods of presenting structural data are mostly limited to variants of the traditional ball-and-stick representation. This approach becomes less attractive when very large biological systems are simulated at microsecond timescales, and is less effective when coarse-grained models are used. Real time rendering of such large systems becomes a difficult task; the amount of information in one single frame of a simulation trajectory is enormous given the large number of particles; at the same time, each structure contains information about one configurational point of the system and no information about statistical weight of this specific configuration. In this paper we report a novel visualization technique based on spatial particle densities. The atomic densities are sampled on a high resolution 3-dimensional grid along a relatively short molecular dynamics trajectory using hundreds of configurations. The density information is then analyzed and visualized using the open-source ParaView software. The performance and capability of the method are demonstrated on two large systems simulated with the MARTINI coarse-grained force field: a lipid nanoparticle for delivering siRNA molecules and monolayers with a complex composition under conditions that induce monolayer collapse.

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Itamura, M., N. Yamamoto, E. Niyama, and K. Anzai. "Application of the flow visualization technique and flow simulation to diecasting flow analysis." International Journal of Cast Metals Research 9, no. 3 (September 1996): 139–43. http://dx.doi.org/10.1080/13640461.1996.11819653.

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Sauer, Franz, Yubo Zhang, Weixing Wang, Stephane Ethier, and Kwan-Liu Ma. "Visualization Techniques for Studying Large-Scale Flow Fields from Fusion Simulations." Computing in Science & Engineering 18, no. 2 (March 2016): 68–77. http://dx.doi.org/10.1109/mcse.2015.107.

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Yanev, A. S., Gustavo R. Dias, and António M. Cunha. "Visualization of Injection Moulding Process." Materials Science Forum 587-588 (June 2008): 716–20. http://dx.doi.org/10.4028/www.scientific.net/msf.587-588.716.

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A special tool-transparent mould designed to visualize the melt flow inside the cavity is used in this research. The aim of the work is to assess the polymer melt behavior under different processing conditions-close to industrial, in conventional and two materials non-conventional injection moulding techniques. The mould is designed with two injection locations and has possibility to change the geometry of the cavity in order to investigate the melt behavior in differently shaped cavities. Visual access in the mould is allowed by the sapphire windows, surrounding the cavity. For image acquisition a high speed video camera NAC 1000 is used. Materials used in the research are three polypropylenes with different flow index. Results are obtained for conventional injection moulding, two material monosandwich and two material biinjection moulding. Apart from visualization, instrumentation of the mould allows to be obtained PT data for each processing condition. Results from conventional injection moulding are compared with MPI5.0 simulations.

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Diab, Samir, and Dimitrios I. Gerogiorgis. "Design Space Identification and Visualization for Continuous Pharmaceutical Manufacturing." Pharmaceutics 12, no. 3 (March 5, 2020): 235. http://dx.doi.org/10.3390/pharmaceutics12030235.

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Progress in continuous flow chemistry over the past two decades has facilitated significant developments in the flow synthesis of a wide variety of Active Pharmaceutical Ingredients (APIs), the foundation of Continuous Pharmaceutical Manufacturing (CPM), which has gained interest for its potential to reduce material usage, energy and costs and the ability to access novel processing windows that would be otherwise hazardous if operated via traditional batch techniques. Design space investigation of manufacturing processes is a useful task in elucidating attainable regions of process performance and product quality attributes that can allow insight into process design and optimization prior to costly experimental campaigns and pilot plant studies. This study discusses recent demonstrations from the literature on design space investigation and visualization for continuous API production and highlights attainable regions of recoveries, material efficiencies, flowsheet complexity and cost components for upstream (reaction + separation) via modeling, simulation and nonlinear optimization, providing insight into optimal CPM operation.

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Dissertations / Theses on the topic "Flow visualization, Visualization techniques, Simulation"

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Üffinger, Markus [Verfasser], and Thomas [Akademischer Betreuer] Ertl. "Advanced visualization techniques for flow simulations : from higher-order polynomial data to time-dependent topology / Markus Üffinger. Betreuer: Thomas Ertl." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2014. http://d-nb.info/1048327558/34.

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Wisby, C. "Real-time digital imaging techniques for flow visualization." Thesis, University of Surrey, 1989. http://epubs.surrey.ac.uk/848586/.

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A real-time digital imaging technique has been applied to smoke flow visualized turbulent flows to provide statistical data concerning bluff body wakes. The 'digital imaging technique' has been successfully applied to the wake of a two-dimensional flat plate, circular cylinder and a jet in a crossflow configuration. A detailed study of the two-dimensional flat plate model involved comparative hot-wire and pressure measurements combined with data from previously published experimental investigations. The results obtained included, intermittency measurements, vortex shedding spectral analyses (autocorrelations), spatial correlations, wake interface statistics and turbulence data. In the majority of cases, the digital imaging technique was found to provide excellent quantitative detail whilst also offering some unique wake interface statistics. The experiments conducted on the circular cylinder model revealed details of secondary vortex shedding and their base-bleed dependence, whilst the jet in a crossflow configuration enabled the imaging technique to be applied to a complex, three-dimensional flow model. The resulting iso-intermittency contour map was produced expediently, and within an experimental period far shorter than could be expected for single-location probe measurements. In addition to the above-outlined quantitative technique, real-time digital imaging was also applied more qualitatively to the study of dynamic stall on an aerofoil and to the enhancement of high-speed vapour-screen visualizations, both techniques offering the possibility for enhanced quantitative flow studies in future investigations. Finally, true-colour video digitisation has been exploited in a preliminary study of the quantification of global surface shear stress values using liquid crystal technology. Although in its infancy, the realisation of an experimental procedure along such lines would be of immense benefit to experimental aerodynamic research.

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Zhao, Amy (Xiaoyu Amy). "Applying video magnification techniques to the visualization of blood flow." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/99799.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2015.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 85-94).
In this thesis, we investigate the use of video magnification for the visualization and assessment of blood flow. We address the challenge of low signal-to-noise ratios in video magnification by modeling the problem and developing an algorithm for measuring the SNR in the context of video magnification. We demonstrate that the algorithm can be used to estimate the SNR of a real video and predict the SNR in the magnified video. We use several techniques based on video magnification to visualize the blood flow in a healthy hand and a hand with an occluded artery, and show that these visualizations highlight differences between the hands that might be indicative of important physiological differences.
by Amy (Xiaoyu) Zhao.
S.M.

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Burr, Janice E. "Jet mixing : the role of numerical flow visualization /." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-12162009-020204/.

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Seaton, M. Scot. "Performance measurements, flow visualization, and numerical simulation of a crossflow fan." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Mar%5FSeaton.pdf.

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Thesis (M.S. in Aeronautical Engineering)--Naval Postgraduate School, March 2003.
Thesis advisor(s): Garth V. Hobson, Raymond P. Shreeve. Includes bibliographical references (p. 69-70). Also available online.

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Schlup, Jason. "Two phase flow visualization in evaporator tube bundles using experimental and numerical techniques." Thesis, Kansas State University, 2013. http://hdl.handle.net/2097/16237.

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Master of Science
Department of Mechanical and Nuclear Engineering
Steven Eckels and Mohammad Hosni
This research presents results from experimental and numerical investigations of two-phase flow pattern analysis in a staggered tube bundle. Shell-side boiling tube bundles are used in a variety of industries from nuclear power plants to industrial evaporators. Fluid flow patterns in tube bundles affect pressure drop, boiling characteristics, and tube vibration. R-134a was the working fluid in both the experimental and computational fluid dynamics (CFD) analysis for this research. Smooth and enhanced staggered tube bundles were studied experimentally using a 1.167 pitch to diameter ratio. The experimental tube bundles and CFD geometry consist of 20 tubes with five tubes per pass. High speed video was recorded during the experimental bundle boiling. Bundle conditions ranged in mass fluxes from 10-35 kg/m[superscript]2.s and inlet qualities from 0-70% with a fixed heat flux. Classification of the flow patterns from these videos was performed using flow pattern definitions from literature. Examples of smooth and enhanced bundle boiling high speed videos are given through still images. The flow patterns are plotted and compared with an existing flow pattern map. Good agreement was found for the enhanced tube bundle while large discrepancies exist for the smooth tube bundle. The CFD simulations were performed without heat transfer with non-symmetrical boundary conditions at the side walls, simulating rectangular bundles used in this and other research. The two-phase volume of fluid method was used to construct vapor interfaces and measure vapor volume fraction. A probability density function technique was applied to the results to determine flow patterns from the simulations using statistical parameters. Flow patterns were plotted on an adiabatic flow pattern map from literature and excellent agreement is found between the two. The agreement between simulation results and experimental data from literature emphasizes the use of numerical techniques for tube bundle design.

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Ferrier, Adrian Jon. "Processing techniques for flow images obtained by planar laser-induced fluorescence." Thesis, Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/24097.

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Tauer, Gregory W. "A graph-based factor screening method for synchronous data flow simulation models /." Online version of thesis, 2009. http://hdl.handle.net/1850/9833.

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Le, Roux Frederick Nicolaas. "The CFD simulation of an axial flow fan." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/4344.

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Thesis (MScEng (Mechanical and Mechatronic Engineering))--University of Stellenbosch, 2010.
ENGLISH ABSTRACT: The purpose of this project is to investigate the method and accuracy of simulating axial ow fans with three-dimensional axisymmetric CFD models. Two models are evaluated and compared with experimental fan data. Veri cation data is obtained from a prototype fan tested in a facility conforming to the BS 848 standards. The ow eld over the blade surfaces is investigated further with a visualization experiment comprising of a stroboscope and wool tufts. Good correlation is found at medium to high ow rates and recommendations are made for simulation at lower ow rates as well as test guidelines at the fan test facility. The results and knowledge gained will be used to amend currently used actuator disc theory for axial ow fan simulation.
AFRIKAANSE OPSOMMING: Die doel van hierdie projek is om die metode en akkuraatheid om aksiaalvloeiwaaiers met drie-dimensionele BVM modelle te simuleer, te ondersoek. Twee modelle word geëvalueer en met eksperimentele waaiertoetse vergelyk. Veri- kasie data is verkry vanaf 'n prototipe waaier wat in 'n fasiliteit getoets is en wat aan die BS 848 standaarde voldoen. Die vloeiveld oor die lemoppervlaktes word ondersoek met 'n visualisering eksperiment wat uit 'n stroboskoop en wolletjies bestaan. Goeie korrelasie word gevind vir medium tot hoë massavloeie en aanbevelings word gemaak vir die simulasie by laer massavloeie met riglyne vir toetswerk in die toets-fasiliteit. Die resultate en kennis opgedoen sal gebruik word in die verbetering van huidige aksieskyfteorie vir numeriese aksiaalvloeiwaaier simulasies.

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Karch, Grzegorz Karol [Verfasser], and Thomas [Akademischer Betreuer] Ertl. "Visualization of two-phase flow dynamics : techniques for droplet interactions, interfaces, and material transport / Grzegorz Karol Karch ; Betreuer: Thomas Ertl." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2017. http://d-nb.info/1154434788/34.

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Books on the topic "Flow visualization, Visualization techniques, Simulation"

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Merzkirch, Wolfgang. Techniques of flow visualization. Neuilly sur Seine, France: AGARD, 1987.

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Merzkirch, Wolfgang. Techniques of flow visualization. Neuilly sur Seine: Agard, 1987.

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Brodlie, K. W. Scientific Visualization: Techniques and Applications. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992.

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Saito, Tsutomu. Numerical simulation and visualization of freejet flow-fields. [S.l.]: [s.n.], 1986.

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Adamovsky, Grigory. Optical techniques for shock visualization and detection. [Washington, D.C.]: National Aeronautics and Space Administration, 1995.

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Computer-assisted flow visualization: Second generation technology. Boca Raton, FL: CRC Press, 1994.

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Stacy, Kathryn. Computer-aided light sheet flow visualization using photogrammetry. Hampton, Va: Langley Research Center, 1994.

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Sakas, Georgios. Fraktale Wolken, virtuelle Flammen: Computer-Emulation und Visualisierung turbulenter Gasbewegung. Berlin: Springer-Verlag, 1993.

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H, Hasbrouck Hope, ed. Landscape modeling: Digital techniques for landscape visualization. New York: McGraw-Hill, 2001.

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Russell, Louis M. Visualization techniques to experimentally model flow and heat transfer in turbine and aircraft flow passages. Cleveland, Ohio: Lewis Research Center, 1991.

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Book chapters on the topic "Flow visualization, Visualization techniques, Simulation"

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Sollows, K. F., C. R. Dutcher, A. C. M. Sousa, and J. E. S. Venart. "Photobleaching Flow Visualization." In Applications of Laser Techniques to Fluid Mechanics, 553–67. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-61254-1_30.

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Pozo Álvarez, Alberto. "Cardiac Flow Visualization Techniques." In Fluid Mechanics Applied to Medicine, 45–58. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-60389-2_4.

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Goto, S., and H. Kato. "Numerical Simulation of Viscoelastic Fluid in Two Dimensional Channel Junctions." In Flow Visualization VI, 97–101. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-84824-7_13.

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Yusoff, Yusman Azimi, Farhan Mohamad, Mohd Shahrizal Sunar, and Ali Selamat. "Flow Visualization Techniques: A Review." In Trends in Applied Knowledge-Based Systems and Data Science, 527–38. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-42007-3_46.

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Bhalla, Upinder S. "Advanced XODUS Techniques: Simulation Visualization." In The Book of GENESIS, 337–62. New York, NY: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4684-0189-9_20.

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Bhalla, Upinder S. "Advanced XODUS Techniques: Simulation Visualization." In The Book of GENESIS, 381–405. New York, NY: Springer New York, 1998. http://dx.doi.org/10.1007/978-1-4612-1634-6_22.

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Ota, Masahiro. "Numerical Visualization of Molecular Motion in Rarefied Gas Flows by Direct Simulation of Monte Carlo Method." In Flow Visualization VI, 772–76. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-84824-7_138.

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Hentschel, W., and S. Hehn. "Flow Analysis Inside a Passenger Car Silencer by Laser Light-Sheet and Coded Particle Trace Techniques." In Flow Visualization VI, 51–55. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-84824-7_6.

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Obermaier, Harald, Jörg Kuhnert, Martin Hering-Bertram, and Hans Hagen. "Stream Volume Segmentation of Grid-Less Flow Simulation." In Mathematics and Visualization, 127–38. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-15014-2_11.

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Besse, L., G. Gottschalk, A. Moser, and P. Suter. "Measurement of the Spatial, Stationary and Time Variable Velocity Distribution of Airflow Using Tracer Particles and Still Video Techniques." In Flow Visualization VI, 223–27. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-84824-7_36.

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Conference papers on the topic "Flow visualization, Visualization techniques, Simulation"

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Laramee, Robert S., and Helwig Hauser. "Geometric flow visualization techniques for CFD simulation data." In the 21st spring conference. New York, New York, USA: ACM Press, 2005. http://dx.doi.org/10.1145/1090122.1090158.

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Manesh, H. F., and M. Hashemipour. "An Educational Software Package for CFD Simulation and Visualization." In ASME/JSME 2007 5th Joint Fluids Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/fedsm2007-37182.

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The development of the Virtual Reality (VR) techniques for visualizaton of the computational simulations of complex problem has opened some new avenues for heat transfer and fluid flow research. The importance of data visualization is clearly recognized for to better understanding of the 3-D nature of the flow fields. This work introduces the educational user friendly “VRJET” package designed for teaching fluid mechanics and heat transfer. A Software is developed with C++ standard Programming language using an object-oriented approach to visualize the flow field with high performance computing including advanced support for data presentation and navigation techniques through 3D virtual environment. This work deals with 3-D visualization of the data of impinging laminar single square jet on a heated flat surface, obtained from numerical simulation. This package can be used for research, educational, and engineering.

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Guo, Long-de, Zhaofei Zhou, and Long Zhang. "Research of the computer simulation technique for flow visualization." In Optical Technology and Image Processing fo rFluids and solids Diagnostics 2002, edited by Gong Xin Shen, Soyoung S. Cha, Fu-Pen Chiang, and Carolyn R. Mercer. SPIE, 2003. http://dx.doi.org/10.1117/12.509784.

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Thurow, B. S. "Recent Progress Towards a High-Speed Three-Dimensional Flow Visualization Technique." In 2007 22nd International Congress on Instrumentation in Aerospace Simulation Facilities. IEEE, 2007. http://dx.doi.org/10.1109/iciasf.2007.4380893.

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Lietsch, Stefan, Christoph Laroque, and Henning Zabel. "Computational Steering of Interactive Material Flow Simulations." In ASME 2008 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/detc2008-49405.

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In this paper we present the integration of computational steering techniques into the interactive material flow simulation d3FACT insight. This kind of simulation differs from traditional, long running High Performance Computing (HPC) simulations such as Computational Fluid Dynamics (CFD) or Molecular Dynamics in many aspects. One very important aspect is that these simulations run in (soft) real-time, thus the corresponding visualization needs to be updated after every step of the simulation. In turn, this allows to let changes, made through the visualization, impact the actual simulation and again, to see the effects in visualization. To allow this kind of control over the simulation and to further provide a flexible basis to integrate several instances of simulation, visualization and steering components, we used and enhanced a self-developed computational steering platform, which fits best for the needs of highly interactive and distributed simulations. Thereby we are able to realize multi-user and comparative scenarios which were not possible in this field of simulations before.

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Zhu, Jianjun, Ruben Cuamatzi-Melendez, Jose Alberto Martinez Farfan, Haiwen Zhu, Jiecheng Zhang, and Hong-Quan Zhang. "Flow Pattern Prediction in Electrical Submersible Pump (ESP) Under Gassy Flow Conditions Using Transient Multiphase CFD Methods With Visualization Experimental Validation." In ASME 2018 5th Joint US-European Fluids Engineering Division Summer Meeting. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/fedsm2018-83081.

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This paper presents a numerical study of flow pattern recognition inside the rotating impeller of electrical submersible pump (ESP) using the transient multiphase CFD simulations. Based on the previous experimental facility for visualizing flow patterns in an ESP, the entire flow domain is constructed. The high-quality structured mesh comprising hexahedral grids is generated using multi-block technique in ANSYS ICEM. Mesh independence is confirmed by comparing numerical results with catalog curves. For transient two-phase simulation, the realized RNG k-ε turbulence model with volume of fluid (VOF) and Eulerian multiphase models is successfully implemented in ANSYS Fluent solver. The sliding mesh technique is applied to interfaces where rotating and stationary parts interact. By incorporating the same boundary conditions as experimental study, two different cases with fixed liquid flow rates and varying gas flow rates are selected to conduct CFD simulations. The comparison of numerical results against experimental visualizations shows that the two-fluid Eulerian model is superior to VOF model in simulating gas/liquid flow in a rotating ESP. The single-phase simulation results match catalog curves of ESP, which validates the numerical methodology. For gas-liquid simulations, the simulated flow patterns with Eulerian model agree well with visualization experiments. The distinct flow patterns prevailing inside the rotating ESP impeller are captured by CFD simulations, including dispersed bubble flow, bubbly flow, and intermittent flow.

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Straccia, Mattia, Rodolfo Hofmann, and Volker Gümmer. "New Methods for Secondary Flow Phenomena Visualization and Analysis." In ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gt2019-91378.

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Abstract This work focuses on presenting new techniques for the visualization of Secondary Flow Phenomena (SFP) in transonic turbomachinery. Here, Rotor 37 has been used to develop and apply these techniques in order to study vortices, shocks and secondary flows. They are also used to provide a comparison between turbulence models in Ansys CFX environment, here the Spalart-Allmaras (SA) and Shear Stress Tensor (SST) turbulence models. The scope of this paper is to give an improved understanding of SFP and how their onset and evolution are influenced from the turbulence model. The analysis is based on results of three-dimensional steady-state RANS simulations, for operating points between design point and near-stall condition, achieved by varying the outlet static pressure radial equilibrium distribution at the rotor exit. The new visualization techniques highlight important flow field features less investigated in previous research works, in particular secondary weak strength vortices. They will give a better visualization of and insight to the interaction of the passage shock and the tip leakage vortex, the interaction between vortices and boundary layers and the interaction of the shock wave and endwall boundary layers.

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Soleimani, Manuchehr, William R. B. Lionheart, A. J. Peyton, and X. Ma. "Molten Metal Flow Visualization Using Mutual Induction Tomography (MIT)." In ASME 7th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2004. http://dx.doi.org/10.1115/esda2004-58016.

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The paper presents further progress in using mutual inductance tomography (MIT) system for molten metal flow visualisation. The MIT image which is the electric conductivity map is the shape of the flow. For the image reconstruction we applied an inverse finite element technique that is able to reconstruct fully 3D MIT images for the purpose of molten steel flow. The experimental tests has been conducted and the results for simulation flow model as well experimental results presented.

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Doumanidis, Charalabos C., and Brian P. Marquis. "Thermal Simulation and Visualization of Virtual Source Manufacturing Systems." In ASME 1995 15th International Computers in Engineering Conference and the ASME 1995 9th Annual Engineering Database Symposium collocated with the ASME 1995 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1995. http://dx.doi.org/10.1115/cie1995-0822.

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Abstract This article addresses visualization of the thermally generated distributions of material structure and properties in the manufactured products, and provides a methodology for offline design of the process conditions in virtual source thermal techniques. These are implemented by timesharing a single heat source, scanning the external surface of the processed part to generate a flexible heat input distribution, and thus a specified temperature field yielding the desired thermal quality of the product. A numerical simulation of generic thermal processing is developed, integrating a solid conduction description to a flow model in molten regions. This computational model is validated by a comparative thermal study of classical and a novel scan welding process, in which the torch reciprocates along the joint to provide uniform thermal features. Virtual source processing is currently simulated for other thermal manufacturing processes and their real-time control with infrared thermal feedback.

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Sano, Yuta, Yutaka Abe, Akiko Fujiwara, Shoji Goto, Fumitoshi Watanabe, and Michitsugu Mori. "Visualization Study on Complicated Flow Through Lower Plenum of BWR." In 16th International Conference on Nuclear Engineering. ASMEDC, 2008. http://dx.doi.org/10.1115/icone16-48339.

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The increase of power outputs enables us to decrease a generation cost such as over thirty nuclear power plants which have adapted an up-rating method in the United States. To success it, it is necessary to evaluate detail thermal hydraulics behavior with high accuracies due to the severe use of internal core structures. The evaluation of coolant flow at a lower plenum of an advanced boiling water reactor (ABWR) is very important because there are a lot of structures such as control rod guide tubes (CRGT) and the core support beams on the fuel assemblies. The coolant flow direction changes from downward to upward with three-dimensional complicated flow in the lower plenum. The simulation results by a CFD (Computational Fluid Dynamics) code can predict such complicated flow in the lower plenum. It is necessary to compare the simulation results with the actual flow in wide range of high Reynolds numbers. And it is required to establish the database of flow structure in lower plenum of ABWR experimentally for the benchmark of CFD code. In the constructed model of the lower plenum of ABWR, we measured velocity profiles by LDV (Laser Doppler Velocimetry) and PIV (Particle Image Velocimetry) techniques with a high speed video camera. The turbulent flow structure of lower plenum of ABWR was evaluated experimentally. In the range of Reynolds number from 103 to 104, the velocity at the center of the test section was faster than the velocity near the wall. The intensity of turbulent increased when the Reynolds number was higher. The velocity profiles in downstream showed the tendency to be flat in the core support beam.

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Reports on the topic "Flow visualization, Visualization techniques, Simulation"

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Denz, Thomas, Stephanie Smith, and Rajeev Shrestha. Multi-Hull Flow Visualization: An Investigation of Flow Visualization Techniques for Trimaran Hulls. Fort Belvoir, VA: Defense Technical Information Center, August 2007. http://dx.doi.org/10.21236/ada486747.

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Kuzay, T. M., H. J. Halle, and K. E. Kasza. Preliminary review of mass transfer and flow visualization studies and techniques relevant to the study of erosion-corrosion of reactor piping systems. Office of Scientific and Technical Information (OSTI), June 1988. http://dx.doi.org/10.2172/7131836.

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