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Flow Visualization of Multi-Hole Film-Cooling Flow under Varying Freestream Turbulence Levels
2016
Journal of Flow Control Measurement and Visualization
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A flat plate film cooling flow from a multi-exit hole configuration has been numerically simulated using both steady and unsteady Reynolds Averaged Navier Stokes (RANS and URANS) Computational Fluid Dynamics ...
This paper presents a numerical study of the flow visualization of the interaction of film cooling jets with a subsonic crossflow. ...
Tim Fitzsimmons of the DOE Office of Science/EPSCoR. The authors would also like to thank CD-ADAPCO for their software training and support throughout this analysis. ...
doi:10.4236/jfcmv.2016.41002
fatcat:enlfk4uqw5fhrjijo6urp3vnz4
Vortex shedding from a ground tracking radar antenna and 3D tip flow characteristics
2013
Progress in Computational Fluid Dynamics, An International Journal
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A 2D unsteady computation of the vortex shedding phenomena is also presented. ...
The current analysis uses a 3D computational approach for the computation of viscous flow details around a highly 3 D tip geometry. ...
UNSTEADY FLOW SIMULATIONS OF VORTEX SHEDDING A 2D unsteady and incompressible solution of the Navier-Stokes equations for ASDE-X antenna was performed using the general purpose fluid dynamics solver Fluent ...
doi:10.1504/pcfd.2013.055055
fatcat:r3w4fbiz4zfijhjjulxdilbkbm
Numerical Simulation of Turbulent Flow Over of Semi-Cylindrical Profile at Zero Angle of Attack
2016
MATEC Web of Conferences
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Results of unsteady two-dimensional numerical simulations for the turbulent flow over the semi-cylindrical profile at Reynolds number 45000 are presented. ...
A series of calculations have been performed for the estimation of influence of mesh resolution in the wake of streamlined body on the unsteady solution accuracy. ...
The low level of pressure can be explained by the high intensity of vortex flow generating under the body (fig
Table 1 . 1 Parameters computational meshes. ...
doi:10.1051/matecconf/20167201100
fatcat:fotmpv37ujakpa6hvgevx57tuu
Subject Index
1990
Journal of Aircraft
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90-003 Viscous Non-boundary-Layer Flows Measurements and Implications of Vortex Motions Using Two Flow-Visualization Techniques 90-160 Vortices Yaw Damping of Elliptic Bodies at High Angles of Attack ...
Sweep, Vortex Lift, and Vortex Strength for Delta Wings 90-080 Unsteady Inviscid and Viscous Computa- tions for Vortex-Dominated Flows 90-062 Control of Turbulent Separated Flow over a Rearward-Facing ...
doi:10.2514/3.56841
fatcat:kz6h2jnjsvd5znrdxardgncnce
Investigation on RANS Computation for an Unsteady Turbulent Flow
2007
Journal of Fluid Science and Technology
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Visualization and investigation of the temporal change of the flow pattern and the instantaneous term-by-term budget of the governing equations reveals that the RANS computation can reproduce the unsteady ...
In the present study, RANS computations for two-dimensional turbulent flow with periodic perturbation over a backward-facing step are performed in order to verify the performance of a low-Reynolds-number ...
Computational Conditions We performed computations for a two-dimensional backward-facing step turbulent flow with periodic perturbation. Figure1 shows a schematic diagram of the computed flow field. ...
doi:10.1299/jfst.2.623
fatcat:zhdpc5nr6zha5o7hbch3ysqcve
High resolution computational unsteady aerodynamic techniques applied to manoeuvring UCAVs
2007
Aeronautical Journal
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AbstractA method of high resolution simulation is proposed for Unmanned Combat Air Vehicles (UCAVs) undergoing manoeuvress at high angle-of-attack or transonic speeds. ...
Finally, a notional UCAV shape from Boeing military aircraft is presented to show the possibilities of how the method can accurately capture the relevant phenomenon of these difficult flight regimes. ...
We w ould also like to thank the DoD High Performance Computing Modernization Office for the grant of computer hours, as well as, Boeing Military Aircraft in St. ...
doi:10.1017/s0001924000004656
fatcat:uycyotc2kbbabnfmyksl6wmaa4
Current status on large-eddy simulation for engineering applications
2007
Journal of Visualization
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Progress on High-Performance Computing and Large-Eddy Simulation The remarkable history of CFD has been supported by a few milestones relating to HPC technology. ...
High-Performance Large-Eddy Simulation for Engineering Applications Two examples of the world's largest class LES for engineering applications are introduced to show the validity of numerical visualization ...
doi:10.1007/bf03181822
fatcat:rlrtfbluzrcxrbzg5y4j66kfiq
Measurement Methods in Rotating Components of Turbomachinery
1981
Journal of Engineering for Power
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This symposium covered all of these aspects while addressing measurements on fluid flow (pressure, velocity, density, turbulence intensity and stress, wall shear stress, unsteady blade pressure) and temperature ...
The flow itself may be unsteady, with subsonic, supersonic, and transonic regions and associated shock phenomena. It is certainly viscous and usually turbulent with appreciable three dimensionality. ...
This symposium covered all of these aspects while addressing measurements on fluid flow (pressure, velocity, density, turbulence intensity and stress, wall shear stress, unsteady blade pressure) and temperature ...
doi:10.1115/1.3230731
fatcat:ak22dkhwqjerrlvijdnd3nfusi
Large Eddy Simulation of isothermal cruciform jet flow: Preliminary results
2016
Perspectives in Science
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The flow field of turbulent jet from cruciform nozzle are described in terms of inverse mean axial velocity decay and visualizations. ...
Three-dimensional cuboid shaped domain was used to simulate the unsteady turbulent flow field. ...
Acknowledgement The first author acknowledges the kind and timely help of Professor Willie R. Quinn of St. Francis Xavier University, Canada for providing the experimental data. ...
doi:10.1016/j.pisc.2016.01.003
fatcat:eohruxfatzdo7dg5dvfmy7mj5m
Computational visualization of unsteady flow around vehicles using high performance computing
2009
Computers & Fluids
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Finally, unsteady aerodynamic forces acting on the vehicle in transient yawing-angle change are estimated and relationship between the flow structures and the transient aerodynamic forces is mentioned. ...
The main objective of our study is to look into the validity of LES for the assessment of vehicle aerodynamics, especially in the context of its possibility for unsteady or transient aerodynamic forces ...
ACKNOWLEDGMENTS This work has been supported by the projects of FSIS and "Revolutionary Simulation Software (RSS21)" sponsored by MEXT, Japan. ...
doi:10.1016/j.compfluid.2008.01.020
fatcat:b2bczfi3j5hahp4xgd5ik57yle
Revealing essential dynamics from high-dimensional fluid flow data and operators
[article]
2019
arXiv
pre-print
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We consider concepts centered around modal analysis, data science, network science, and machine learning to reveal the essential dynamics from high-dimensional fluid flow data and operators. ...
The presentation of the material herein is example-based and follows the author's keynote talk at the 32nd Computational Fluid Dynamics Symposium (Japan Society of Fluid Mechanics, Tokyo, December 11-13 ...
high-dimensional fluid flow data and operators. ...
arXiv:1903.01913v1
fatcat:xved2uchejgcjo7ezmucpzqnmy
Toward the simulation of complex 3D shear flows using unsteady statistical turbulence models
2004
International Journal of Heat and Fluid Flow
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Comparisons between the computed results and laboratory measurements and flow visualization experiments lead to the conclusion that even relatively simple turbulence closure models (such as the standard ...
Recent progress in the numerical simulation of complex, 3D incompressible flows with unsteady statistical turbulence models is reviewed. ...
Acknowledgements This work was supported by NSF Career grant 9875691, a grant from Georgia DOT, and a grant from Oak Ridge National Laboratory and DOE. We thank Terry W. ...
doi:10.1016/j.ijheatfluidflow.2004.02.002
fatcat:awhb6b644jht5dm2u32v4m4buu
Numerical prediction of steady and unsteady tip vortex cavitation on hydrofoils
2012
Polish Maritime Research
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a short description of the method and a computational example demonstrating its performance. ...
The objective of the research was to design the optimum discrete grid structure for this specific computational task and to select the best turbulence model for such an application The article includes ...
Acknowledgement The research described in this article has been conducted with the support of the Research Grant No. N N504 088738 of the Polish National Centre for Research and Development (NCBR). ...
doi:10.2478/v10012-012-0026-2
fatcat:ormxj7qcfnalrimswtdh3tmby4
Evaluation of three turbulence models in static air loads and dynamic stall predictions
1990
Journal of Aircraft
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This work summarizes the performance of these three turbulence models for a variety of steady and unsteady flow conditions. ...
Concluding Remarks
A number of steady and unsteady flows of interest to fixed and rotary wing industries have been calculated using three turbulence models. ...
doi:10.2514/3.25285
fatcat:vjq4rvtoavfkpi2li4mmkzjvaq
An investigation into the interaction of closely-spaced starting jets
2007
Experimental Thermal and Fluid Science
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Flow visualization of the scavenging flow was performed using a scaled fixed-piston water model and was used as a means of validating the URANS simulations themselves. ...
The flow visualization experiments provided insight into the complex jet-jet and jet-wall interactions within the engine cylinder. ...
A handful of studies examining the relation between entrainment rates and unsteady jets have been performed. ...
doi:10.1016/j.expthermflusci.2006.12.004
fatcat:e2v3cqedtjfkzcryb3puzekkiy
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