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[Question #694463]: Does DFNFlowEngine only be used to simulate cube or cylinder models

To: yade-users@xxxxxxxxxxxxxxxxxxx
From: Liu Changdong <question694463@xxxxxxxxxxxxxxxxxxxxx>
Date: Fri, 11 Dec 2020 07:01:04 -0000
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New question #694463 on Yade:
https://answers.launchpad.net/yade/+question/694463

Hi everyone:
I have a question with DFNFLOWEngine. I want to use DFNFlowEngine to simulate a cube model with a tunnel, but there are always problems, like 
negative volume for an ordinary pore (temp warning, should still be safe)
CHOLMOD warning: matrix not positive definite. file: ../Supernodal/t_cholmod_super_numeric.c line: 911
something went wrong in Cholesky factorization, use LDLt as fallback this time1.

So my question is :Can DFNFLOWEngine simulate the irregular model? like a cube model with a tunnel.

If you have some ideas I would be more than grateful!

Best

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