Moving Mesh with GGI

Submitted by steve on Wed, 03/02/2011 - 11:54

Hi,
I am trying to run a simulation like the paddle mixer from the CFD-DEM page. The GGI is included in the 1.5-dev but not in the 1.6 of OpenFOAM, so I tried to compile the solver with 1.5-dev but it doesn't work.
How was the paddle mixer setup?
Thank you
Stephan

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cgoniva's picture

cgoniva | Wed, 03/02/2011 - 14:48

Hi Stephan,

you will need the functionality of the -dev version for that, so you need to compile the package in the -dev version. There is a precompiler switch in the cloud files which should do one part of that job. There might be some other changes necessary in the Make/options file as some libraries might have a different name. (compiler will tell you ;-)

Cheers,
Chris

steve | Thu, 03/03/2011 - 16:16

Hi Chris,

thanks for your useful answer.
I effectually compiled the solver with 1.5-dev but the CFD mesh still don't move.
I was trying to change the meshMotionModel in constant/couplingProperties, which led to an error, that this is not possible.
Can you give me further instructions to solve this problem?

Thanks
Stephan

cgoniva's picture

cgoniva | Fri, 03/04/2011 - 08:51

Hi Stephan,

there are no changes necessary to the mesh motion model (it is designed as interface for mesh deformation and motion - but will probably be changed with the next version of cfdem).

what you simply need to do is:
-use the std. GGI - sliding interface functionality of the dev version (check a CFD-online forum for that)
-move the parts on the DEM side with LIGGGHTS functionality (check the LIGGGHTS forum for that)
-make sure that the motion on both sides is in sync. (there is no tool available which does that job for you)

best regards,
Chris