Is it possible to solve the flow field with different turbulence models on regions

yzf1215 · November 17, 2013, 00:57

Let's say, I need part of the mesh solving by LES and part of the mesh solving by DES or RANS. The hole domain is a channel, the upstream should be solved by a LES solver and downstream should be solved by DES/RANS solver.

Is it possible to do that in OpenFOAM? How?

Thanks

Linse · November 18, 2013, 16:18

Dear Zifei,

interesting question! To my knowledge it will be quite challenging to couple these two different ways of solution.

Probably your best chances are either with one of the multiRegion-solvers (to my knowledge a fluid-fluid-interface is not yet implemented in that one) or with the fvMeshSubset-functionality.
Unfortunately I am not deep enough in the development right now to know if something like that is implemented so far. Good luck with finding the capabilities in OpenFoam! ;-)

Regards,
Bernhard

Bernhard · November 19, 2013, 03:24

You might want to look at LEMOS
http://www.lemos.uni-rostock.de/en/d.../cfd-software/

November 17, 2013, 00:57	Is it possible to solve the flow field with different turbulence models on regions	#1
yzf1215 Member Zifei Yin Join Date: Sep 2012 Location: Shanghai & Ames Posts: 33 Rep Power: 14	Let's say, I need part of the mesh solving by LES and part of the mesh solving by DES or RANS. The hole domain is a channel, the upstream should be solved by a LES solver and downstream should be solved by DES/RANS solver. Is it possible to do that in OpenFOAM? How? Thanks

November 18, 2013, 16:18	Coupling DNS and RANS	#2
Linse Senior Member Bernhard Linseisen Join Date: May 2010 Location: Heilbronn Posts: 183 Blog Entries: 1 Rep Power: 16	Dear Zifei, interesting question! To my knowledge it will be quite challenging to couple these two different ways of solution. Probably your best chances are either with one of the multiRegion-solvers (to my knowledge a fluid-fluid-interface is not yet implemented in that one) or with the fvMeshSubset-functionality. Unfortunately I am not deep enough in the development right now to know if something like that is implemented so far. Good luck with finding the capabilities in OpenFoam! ;-) Regards, Bernhard

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November 19, 2013, 03:24		#3
Bernhard Senior Member Bernhard Join Date: Sep 2009 Location: Delft Posts: 790 Rep Power: 22	You might want to look at LEMOS http://www.lemos.uni-rostock.de/en/d.../cfd-software/