scholarly journals High Reynolds number airfoil turbulence modeling method based on machine learning technique

2021 ◽  
pp. 105298
Author(s):  
Xuxiang Sun ◽  
Wenbo Cao ◽  
Yilang Liu ◽  
Linyang Zhu ◽  
Weiwei Zhang
Keyword(s):  
Machine Learning ◽  
Reynolds Number ◽  
High Reynolds Number ◽  
Turbulence Modeling ◽  
Modeling Method ◽  
Machine Learning Technique ◽  
Learning Technique ◽  
High Reynolds

Assessment of a Second-Moment Closure Model for Strongly Heated Internal Gas Flows

2007 ◽  
Vol 129 (12) ◽  
pp. 1719-1722 ◽  
Author(s):  
Robert E. Spall ◽  
Eugen Nisipeanu ◽  
Adam Richards
Keyword(s):  
Heat Transfer ◽  
Reynolds Number ◽  
High Reynolds Number ◽  
Turbulence Modeling ◽  
Cylindrical Tube ◽  
High Heat ◽  
Moment Closure ◽  
High Heat Flux ◽  
Second Moment Closure ◽  
High Reynolds

Both low- and high-Reynolds-number versions of the stress-ω model of Wilcox (Turbulence Modeling for CFD, 2nd ed., DCW Industries, Inc.) were used to predict velocity and heat transfer data in a high-heat-flux cylindrical tube for which fluid properties varied strongly with temperature. The results indicate that for accurate heat transfer calculations under the conditions considered in this study, inclusion of low-Reynolds-number viscous corrections to the model are essential. The failure of the high-Reynolds-number model to accurately predict the wall temperature was attributed to an overprediction of the near-wall velocity.

scholarly journals Aerodynamic Flow Visualisation Over Surfaces Using Smoke Separation Method from Ansys Fluent

2020 ◽  
Vol 5 (7) ◽  
pp. 32-35
Author(s):  
Virendra Talele ◽  
Niranjan Sonawane ◽  
Omkar Chavan ◽  
Akash Divate ◽  
Niraj Badhe ◽  
...  
Keyword(s):  
Reynolds Number ◽  
Fluid Flow ◽  
High Reynolds Number ◽  
Turbulence Modeling ◽  
Tracking System ◽  
Adverse Pressure Gradient ◽  
Point Particle ◽  
Flow Visualisation ◽  
Ansys Fluent ◽  
High Reynolds

In the present study, three workbench problem for turbulence modeling with high Reynolds number is used to determine the behavior of fluid flow around the surfaces. The cases for simulation is developed using Ansys workbench CFD fluent module. The computational results are obtained using solution sets of high Reynolds number with the LagrangianEulerian (LE) approach of point particle tracking system in Nevers stoke RANS Equation. The effect of flow pattern around the surface and its kinetic behavior of fluid is evaluated in post-process method of results. By observation, it has been tabulated that fluid flow separation is arousal at the corner end of all surfaces which happens due to evoking of a large adverse pressure gradient.

scholarly journals Implicit Turbulence Modeling for High Reynolds Number Flows

2002 ◽  
Vol 124 (4) ◽  
pp. 862-867 ◽  
Author(s):  
L. G. Margolin ◽  
P. K. Smolarkiewicz ◽  
A. A. Wyszogrodzki
Keyword(s):  
Numerical Simulation ◽  
Reynolds Number ◽  
High Reynolds Number ◽  
Turbulence Modeling ◽  
Inviscid Limit ◽  
Scale Model ◽  
Spectral Studies ◽  
Decaying Turbulence ◽  
High Reynolds ◽  
Pseudo Spectral

Implicit turbulence modeling is the numerical simulation of high Reynolds fluid flow using nonoscillatory finite volume (NFV) schemes without any explicit subgrid scale model. Here we investigate the ability of a particular NFV scheme, MPDATA, to simulate decaying turbulence in a triply periodic cube for a variety of viscosities, comparing our results to analogous pseudo-spectral studies. In the regime of direct numerical simulation, MPDATA is shown to agree closely with the pseudo-spectral results. As viscosity is reduced, the two model results diverge. We study the MPDATA results in the inviscid limit, using a combination of mathematical analysis and computational experiment. We validate these results as representing the turbulent flow in the limit of very high Reynolds number.

Modeling and Simulation of High Reynolds' Number Flows During Reaction Injection Mold Filling

1994 ◽  
Vol 9 (3) ◽  
pp. 279-285 ◽  
Author(s):  
Rahima K. Mohammed ◽  
Tim A. Osswald ◽  
Timothy J. Spiegelhoff ◽  
Esther M. Sun
Keyword(s):  
Reynolds Number ◽  
Modeling And Simulation ◽  
High Reynolds Number ◽  
Mold Filling ◽  
Injection Mold ◽  
High Reynolds ◽  
Reynolds Number Flows
Sign in / Sign up

Export Citation Format

Share Document