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Negative Cell Volume with moveDyMEngineMesh with Foam Extend 3.0

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Old   January 24, 2014, 04:29
Default Negative Cell Volume with moveDyMEngineMesh with Foam Extend 3.0
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RJ HO
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Hi foamers,

I manage to have this case running with older version of OpenFoam-1.6ext. But, it doesn't work with another computer of mine installed with Foam-Extend-3.0. I can't identify where is the different between older version OpenFoam 1.6-ext and Foam-Extend-3.0.

attached is a sample case and any help here will be greatly appreciated.

Code:
--> FOAM FATAL ERROR: 
negative cell volume. Error in mesh motion before topological change.

    From function bool layerAdditionRemoval::changeTopology() const
    in file polyMeshModifiers/layerAdditionRemoval/layerAdditionRemoval.C at line 295.

FOAM aborting

Aborted (core dumped)
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File Type: gz Engine.tar.gz (22.2 KB, 12 views)
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Old   May 7, 2014, 19:23
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virelli giuseppe
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Hi JR87,
I am finding problems similar to yours in migrating from 1.6-ext version to 3.0-ext version.
The dieselEngineDyMFoam solver that I created where I activated "layer addition removal" does not work properly anymore in 3.0-ext (on the other hand it works properly in 1.6-ext):
there is no layer removal even though "minimal thickness" < "removal threshold" and at the end the simulation crashes because of negative volume!

Did you solve? Have you got some suggestion?
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Old   May 8, 2014, 12:13
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Marco A. Turcios
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Speaking only from my experiences with getting the layerAdditionRemoval modifier to work in the official versions, I would check the mesh class you are using (seems like layerAR for the engineTopoChangerMesh type) is actually sending the signal to remove layers. The variable in the update() function is realDeformation I think.
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