|January 7, 2014, 12:55||
k-Epsilon thermal simulation
Join Date: Mar 2009
Location: Bruxelles, Belgium
Posts: 52Rep Power: 9
I'm using a temperature equation version of the simpleFoam solver. I did an isothermal periodic channel flow simulation with Re_tau=150 and used both k-epsilon and v2f turbulence models. It is a resolved simulation, so I used the low-Re version of the k-Epsilon model. The results are fairly reproduced the reference DNS data.
After I've switched to a heated case and there I got problem with the k-Epsilon (the v2f remained adequately good in therms of the momentum boundary layer). Surprisingly, the momentum BL has changed, though, the temperature should be only acts as a scalar transport (no buoyancy). Could anyone tell me what could go wrong? I've tried different boundary conditions, turbulent Pr numbers. I tried the 2 low-Re models. Whatever I did, the velocity gradient normal to the wall reduces with 30%, approximately.
Thank you for your help,
|channel flow, k-epsilon, low-re, simplefoam, thermal analysis|
|Thread||Thread Starter||Forum||Replies||Last Post|
|Differences and functions of Solidworks Simulation and Solidworks Flow Simulation?||alpharays||Main CFD Forum||0||April 19, 2012 03:13|
|IAPWS water properties + orthotropic thermal conductivity||Chander||CFX||1||February 29, 2012 18:26|
|SimpleFoam k and epsilon bounded||nedved||OpenFOAM Running, Solving & CFD||1||November 25, 2008 21:21|
|Initial k & epsilon for engine simulation||Tomislav Sencic||Main CFD Forum||1||November 27, 2007 06:21|
|Thermal cycling simulation - FAN issue||Jean-Baptiste||Main CFD Forum||4||April 19, 2007 09:02|