CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Turbulent dissipation residual is cut-off at 5e-1

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

Sponsored Links

LinkBack Thread Tools Display Modes
Old   June 20, 2014, 06:12
Default Turbulent dissipation residual is cut-off at 5e-1
New Member
Joakim M. Johansen
Join Date: Apr 2013
Location: Denmark
Posts: 17
Rep Power: 6
jmjohansen is on a distinguished road
Sponsored Links
I'm running a 2D axisymmetric swirl DPM combustion model and I just ran into a problem, that I have not seen before.

Using the k-epsilon the value for the residual for the turbulent dissipitation is cut off at 4.9992e-01. The TUI does not report any parameters being limited.

I have en closed a screen cap of the residual plot.

Inputs on ideas or solutions are all very welcome.

Thanks in advance,

Attached Images
File Type: jpg epsilon.jpg (50.2 KB, 7 views)
jmjohansen is offline   Reply With Quote
Sponsored Links

Old   June 20, 2014, 11:29
Join Date: Nov 2010
Posts: 90
Rep Power: 8
Sun is on a distinguished road
Right off the top of my head and it might not be necessarily useful, run the simulation without solving the turbulence and see if the residuals show something weird and after a while enable the equation for the turbulence and see how it goes.
Sun is offline   Reply With Quote

Old   June 23, 2014, 11:49
Join Date: Feb 2012
Location: Canada
Posts: 92
Rep Power: 7
enayath is on a distinguished road

You may need to make sure that you have a good mesh. (skewness, orthogonality, boundary layers)
enayath is offline   Reply With Quote


epsilon, residual, turbulent dissipitation

Thread Tools
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 On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Cannot run the code properly: very large time step continuity error crst15 OpenFOAM Running, Solving & CFD 9 December 14, 2014 19:17
Courant-number explodes after a lon while (icoFoam) Rody- OpenFOAM Running, Solving & CFD 6 January 29, 2014 05:27
Unstabil Simulation with chtMultiRegionFoam mbay101 OpenFOAM Running, Solving & CFD 13 December 28, 2013 14:12
pimpleFoam: turbulence->correct(); is not executed when using residualControl hfs OpenFOAM Running, Solving & CFD 3 October 29, 2013 09:35
Unknown error sivakumar OpenFOAM Pre-Processing 9 September 9, 2008 12:53

Sponsored Links

All times are GMT -4. The time now is 03:05.