Sequence diagram wallfuntions

juhuettn · September 22, 2014, 04:03

Hello all,

I am trying to program a new wallfunction which is interacting with the kEpsilon model. Depending on values calculated in my wallfunction, the turbulence model needs to choose between two functions for calculating Epsilon and return it to the wallfunction.
I am looking now for a Sequence Diagram or something similar to understand the correct timeline interaction between the wallfunction and the turbulence model, can anyone help?

Thanks very much,
Julian

jherb · October 30, 2014, 07:32

I am not really sure, but I think it is done this way:
The values for the wall are calculated in the in wall boundary condition, e.g. in nutWallFunctionFvPatchScalarField.C in updateCoeffs(). Then in the turbulence model, e.g. kOmegaSST.C, in correct() this function is somehow called (there is e.g. a call to omega_.boundaryField().updateCoeffs()

and the values used for the equations (k and omega).

Hope this helps (and is not much too late).

September 22, 2014, 04:03	Sequence diagram wallfuntions	#1
juhuettn New Member Julian Hüttner Join Date: Nov 2013 Location: Karlsruhe, Germany Posts: 22 Rep Power: 12	Hello all, I am trying to program a new wallfunction which is interacting with the kEpsilon model. Depending on values calculated in my wallfunction, the turbulence model needs to choose between two functions for calculating Epsilon and return it to the wallfunction. I am looking now for a Sequence Diagram or something similar to understand the correct timeline interaction between the wallfunction and the turbulence model, can anyone help? Thanks very much, Julian

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October 30, 2014, 07:32		#2
jherb Senior Member Joachim Herb Join Date: Sep 2010 Posts: 650 Rep Power: 21	I am not really sure, but I think it is done this way: The values for the wall are calculated in the in wall boundary condition, e.g. in nutWallFunctionFvPatchScalarField.C in updateCoeffs(). Then in the turbulence model, e.g. kOmegaSST.C, in correct() this function is somehow called (there is e.g. a call to omega_.boundaryField().updateCoeffs() and the values used for the equations (k and omega). Hope this helps (and is not much too late).