|
[Sponsors] |
October 4, 2022, 17:32 |
kEpsilon vs kkLOmega RANS simulations
|
#1 |
Senior Member
Farzad Faraji
Join Date: Nov 2019
Posts: 206
Rep Power: 8 |
Hello all
I want to use kkLOmega instead of kEpsilon for my RANS turbulent model since kkLOmega can capture transition between laminar to turbulence and my case is laminar in most of the geometry. Using kEpsilon, I can run the simulation without any problem, and in the other hand when I want to use kkLOmega, I get below output and code diverges; Code:
surfaceFieldValue CCAaverageWallShearStresses: total faces = 80800 total area = 0.000424686 wallShearStress wallShearStress1 write: writing object wallShearStress min/max(Artery_CCAwall) = (-0.0940689 0 -0.0936459), (0.0903153 0.00531667 0.0936459) min/max(Artery_ICAwall) = (-0.0651761 -0 -0.0651761), (0.0652406 0.00980282 0.0652406) min/max(Artery_ECAwall) = (0 0 0), (0 0 0) min/max(Artery_CCAin) = (-0.143562 0.0864451 -0.143553), (0.137284 0.358887 0.143553) min/max(Artery_ICAout) = (-0.0157779 0.0636099 -0.015537), (0.015537 0.268776 0.015537) min/max(Artery_ECAout) = (0 0 0), (0 0 0) Time = 1 smoothSolver: Solving for Ux, Initial residual = 1, Final residual = 0.053834, No Iterations 2 smoothSolver: Solving for Uy, Initial residual = 1, Final residual = 0.0586568, No Iterations 2 smoothSolver: Solving for Uz, Initial residual = 1, Final residual = 0.0518649, No Iterations 2 GAMG: Solving for p, Initial residual = 1, Final residual = 0.0514959, No Iterations 10 GAMG: Solving for p, Initial residual = 0.0671865, Final residual = 0.0017498, No Iterations 2 time step continuity errors : sum local = 3.54849, global = 0.043344, cumulative = 0.043344 Thanks, Farzad |
|
Tags |
kepsilon, kklomega, openfoam, rans, turbulence |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
RANS Grid Sensitivity Divergence on LES Grid | MikeBravo | Main CFD Forum | 33 | September 16, 2020 00:53 |
Confusion choosing between static / transient simulations | TharunSK | CFX | 1 | March 15, 2019 18:53 |
Can SU2-6.0.1 do RANS + Rotating Mesh simulations for helicopter rotors? (Bug?) | adrisabate | SU2 | 0 | July 20, 2018 09:08 |
Source terms in epsilon equation (kEpsilon RANS) | roadRunner | OpenFOAM Programming & Development | 6 | April 21, 2015 11:09 |
Request for truth on VLES/Unsteady RANS | Nick Georgiadis | Main CFD Forum | 16 | September 1, 1999 17:43 |