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#1 |
New Member
Join Date: Sep 2010
Location: germany
Posts: 20
Rep Power: 15 ![]() |
hi all.
i'm simulating a rolling piston with a moving mesh. I use the remesh method . the setings for the walls of the slider which is directly connected to the piston are; deforming. the piston motion is defined by a udf. the main problem is that the simulation takes some iterations, but then accurs an arror. the error at the calculation process is: Divergence detected at AMG-Solver and the error at the preview mesh motion is: negative cell volumen detected. do some one has a hint, what is wrong |
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#2 |
Member
Arash
Join Date: Dec 2009
Location: Denmark
Posts: 37
Rep Power: 16 ![]() |
Hi,
I think It's because of poor quality of your meshes. try to improve it, it might help |
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#3 |
New Member
Join Date: Sep 2010
Location: germany
Posts: 20
Rep Power: 15 ![]() |
Hi arash_7444 thank you for reply.
I dont think that the problem is because of poor mesh quality, but in any case I will check it tomorrow. what i not understand is: why the calculation of the case takes some iterations an then the error eccurs. schould the mesh not be remeshed if the maximum scew gous over the maximum scew factor? |
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#4 |
New Member
Join Date: Sep 2010
Location: germany
Posts: 20
Rep Power: 15 ![]() |
hi arash_7444, I just checked the mesh quality and the error is the same .
may you have any other hints, how to solve this problem. thank's in andvance. |
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#5 |
New Member
Join Date: Sep 2010
Location: germany
Posts: 20
Rep Power: 15 ![]() |
i solved the problem. the slider and the rotary pistow were connected, but this is not allowed if the piston is a rigid body.
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