Hello everybody, I'm quite
I'm quite new to OpenFoam, and i was trying to test the k-omega-SST turbulence model in OF 1.4, and i got some errors. I would like to check back with you guys if I did the right things.
I'm running a 2D case on a "elbow"-tube geometry (like this: _| , hope you understand) with the simpleFoam-solver.
The following errors occurred:
1. The solver needed a "omega" file.
-> I made a copy of the "k" file, replacing the k with omega, changed the dimensions to [0 0 -1 0 0 0 0] and made an initial guess for omega via omega = sqrt(k) / L.
2. I got an error saying "keyword DomegaEff,omega not found in dictionary laplacianSchemes" or something like that.
-> I inserted the line " laplacian(DomegaEff,omega) Gauss linear corrected;" in the "fvSchemes" file
After this, the case was calculated without errors.
Now: Is what i did the right way to do this, and is this from a mathematical/physical view correct??
Strange thing: I wanted to copy-paste the laplacian-error in this thread, so i commented the "laplacian..." line out of fvSchemes, but the solver runs without problems, i cannot reproduce this error...
Keep up the good work!
Hello! I'm making some tests
I'm making some tests with the new kOmegaSST model in OF 1.4, and it seems to work quite well.
However, I couldn't find anywhere if there is a transition model implemented or not.
Can someone clarifing the question?
There is no transition model i
There is no transition model implemented in the kOmegaSST model.
Thanks a lot for the quick ans
Thanks a lot for the quick answer!
I've a question about k-omega
I've a question about k-omega SST and more generally about Low-Re turbulence model!
These models do not use the wall function approach on the contrary of general k-epsilon model.
With wall function models I have to set the wall boundary conditions for k and epsilon imposing zero gradient.
It is the same for k-omega SST and low-Re models?
Another question is : have I to define the wallFunctionCoeff in turbulenceProperties dictionary? If I don't define this keyword I obtain an error.
Hi, I have a question regardin
Hi, I have a question regarding the changes one need to make in the fvSchemes and fcSolution files to get the kOmegaSST turbulence model to work in version OF 1.4.1. I follow the guidelines that Peter Heering laid out in the first message of this thread, and added the extra entries/changes to make the case run. However, these changes didn't show up in FoamX and if I saved the case in FoamX I would loose the changes I had allready made by hand in the 2 files. How can I remedy this problem?
I'm playing around with the k-
I'm playing around with the k-omega SST model right now and I've had the same thing happen. If you switch to K-omegaSST in foamX it won't make the correct files/changes to files. If you make the changes yourself and then re-open foamX it complains about not being able to find things to do with epsilon (because I got rid of them). I haven't managed to lose the changes I made yet by opening the case in foamx, just had it complain.
Hi Andrew, Have you tried to
Have you tried to save your case in FoamX? I consistently loose all the changes I make by hand in fvSchemes and fvSolution if I save the case in FoamX. I guess this problem is connected to the fact that changes doesn't show up in FoamX when I load the case. For example, I have added an initial omega field by copying and renaming the .../0/k file to .../0/omega and made some relevant changes inside the file also. This field doesn't show up in the FoamX case browser but I can run the case without problems. My guess is that I have to modify some configuration files for FoamX. Maybe in "$HOME/OpenFOAM/OpenFOAM-1.4.1/applications/solvers/incompressible/simpleFoam/Fo amX/"? But right now I wouldn't know what to change?
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