[Other] moveDynamicMesh

nico_martinez · May 25, 2021, 17:42

Hello everyone.

I'm working with moveDynamicMesh (started form SnakeRiver Tutorial).

I created my domine with salome, and evertythings looks ok, checkMesh (for domain) is perfect.

Then when i used moveDynamic, it work, but generated a lot of "error" (Max skew, non-ortogonaly faces, incorrectly oriented, Zero or negative cell volume detected).
I'm new user.

I check and review my domain, changing a lot (increasing, descresing, all the combination), but nothing works... I also check the stl file (it is a topograṕhy) and seem to be ok to...

Somebody can help me please??

Regaras

AtoHM · May 26, 2021, 01:31

I have no experience with moveDynamicMesh, but from your description it seems you deform the mesh too much. Its good you checked it before going into the simulation, but you have to make sure the displacements are handled well by the mesh.

Maybe try smaller displacements first to see where you get into trouble. But some problems just can't be solved with one mesh.

May 25, 2021, 17:42	moveDynamicMesh	#1
nico_martinez New Member Nicolas Martinez Join Date: May 2016 Posts: 1 Rep Power: 0	Hello everyone. I'm working with moveDynamicMesh (started form SnakeRiver Tutorial). I created my domine with salome, and evertythings looks ok, checkMesh (for domain) is perfect. Then when i used moveDynamic, it work, but generated a lot of "error" (Max skew, non-ortogonaly faces, incorrectly oriented, Zero or negative cell volume detected). I'm new user. I check and review my domain, changing a lot (increasing, descresing, all the combination), but nothing works... I also check the stl file (it is a topograṕhy) and seem to be ok to... Somebody can help me please?? Regaras

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May 26, 2021, 01:31		#2
AtoHM Senior Member M Join Date: Dec 2017 Posts: 642 Rep Power: 12	I have no experience with moveDynamicMesh, but from your description it seems you deform the mesh too much. Its good you checked it before going into the simulation, but you have to make sure the displacements are handled well by the mesh. Maybe try smaller displacements first to see where you get into trouble. But some problems just can't be solved with one mesh.