We are implementing a turbulen
We are implementing a turbulence potential model into OpenFOAM, in fact we already done it http://www.cfd-online.com/OpenFOAM_D...part/happy.gif .
in short, I don't wanna use wall function. How can I get turn off this option? |
I don't know the answer to you
I don't know the answer to your question, but out of curiosity, are you resolving the flow all the way down to the wall (similar to Fluent's Enhanced Wall Treatment approach)?
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The wall functions in OpenFOAM
The wall functions in OpenFOAM are implemented by manipulating the generation term, the dissipation on the wall and wall viscosity. Have a look at the following file:
OpenFOAM-1.3/src/turbulenceModels/incompressible/kEpsilon/kEpsilon.C in kEpsilon::correct() there are 3 #include files: wallFunctionsI.H wallDissipationI.H wallViscosityI.H The first one specifies G and epilon near the wall, the second one blocks out the calculation of epsilon in near-wall cells and the third one fixes the near-wall viscosity. If you do not wish to use the wall functions, do not use this in your model. An example of a model with no wall functions is OpenFOAM-1.3/src/turbulenceModels/incompressible/LaunderSharmaKE. As you can see, equations are solved without manipulation. Enjoy, Hrv P.S. Which model are you implementing + how come we haven't already got it? |
as soon as possible...
as soon as possible...
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