DEM and CFD on different domain decomposition?

Submitted by dbxmcf on Sun, 06/26/2016 - 23:09

Hi, All:

I am running a CFD-DEM coupled simulation using CFDEM, the number of particles is large while the fluid domain is quite simple and small, so I want to use many cores on the DEM side (e.g. processors 5 5 20) and few process on the CFD OpenFOAM side (total domains 4, using 2 2 1), is that possible to be done using the current CFDEM coupling? Does the DEM has to be the same domain decomposition as OpenFOAM?

Thanks for any suggestions!

Roy

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alice's picture

alice | Mon, 07/11/2016 - 10:45

Hello Roy,
at the moment you have to use the same number of processors on the CFD and DEM side. However, it is possible to use different decompositions by means of processor-distribution (i.e. (2 1 1) on the CFD side and (1 2 1) on the DEM side).
Best regards,
Alice

dbxmcf | Wed, 07/27/2016 - 04:28

Hi, Alice:

Thanks for your reply, if I want to change this setting, i.e., make the CFD and DEM be able to use different number of domains, could you please tell what are the possible necessary changes (e.g. like fix_cfd_coupling.cpp) are needed regarding the codes on the DEM side and cfdemSolvePiso?

Thanks a lot!

Roy