CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Running, Solving & CFD

k-Epsilon thermal simulation

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Search this Thread Display Modes
Old   January 7, 2014, 12:55
Default k-Epsilon thermal simulation
Kapa Lilla
Join Date: Mar 2009
Location: Bruxelles, Belgium
Posts: 57
Rep Power: 15
klilla is on a distinguished road
Dear All,

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,
klilla is offline   Reply With Quote

Old   August 29, 2017, 07:52
Senior Member
Peter Baskovich
Join Date: Jul 2014
Posts: 127
Rep Power: 10
pete20r2 is on a distinguished road
Hi, I realise I am a bit late but I'd like to discuss this.
Did you check your thermophysical properties? There could be a thermal thinning term in there.
Also, how are you handling the T field periodically?
pete20r2 is offline   Reply With Quote


channel flow, k-epsilon, low-re, simplefoam, thermal analysis

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

Similar Threads
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 04:13
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 10:02

All times are GMT -4. The time now is 09:55.