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May 29, 2009, 03:57 |
How to detect errors in the mesh
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#1 |
New Member
Rosa Esposito
Join Date: May 2009
Posts: 5
Rep Power: 16 |
Hallo to everyone.
I am solving one case with the electromagnetic features, and the simulation clerly diverges due to one error in the mesh that I don't manage to find. I am aware that with electromagnatic feature parameteres like the Volume Change are quite important, and I tried to have one uniform mesh. Unfortunately, I have to reduce the numebr of nodes somewhere, in order to not have some kind of 10000000 nodes simulation. My question is: if I manage to change something in the output parameter in PRE, can I detect the point of the mesh who gives me problems, and so to try to change the mesh with one purposefully strategy? I can upload the file somewhere, every help is welcome. |
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May 29, 2009, 07:05 |
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#2 |
Member
Join Date: Mar 2009
Posts: 44
Rep Power: 17 |
Output the equation residuals and look up where the maximum residual occurs. This will give you an idea of the source of your (mesh-related) convergence issues.
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May 29, 2009, 07:24 |
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#3 |
New Member
Rosa Esposito
Join Date: May 2009
Posts: 5
Rep Power: 16 |
Thanks a lot. I did it.
The mesh is something like 5000000 nodes and I need some time for the results. My problem is: the simulation is good, till something goes wrong and the in some part of the mesh the Temperature jumps to high (not acceptable) values, and then diverges. So, if I understood good, is it enough to look whare the residual have some high values, and there I find the problem? Last edited by rosaesposito; May 29, 2009 at 07:35. Reason: Grammar error ;-) |
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May 29, 2009, 07:56 |
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#4 |
Member
Join Date: Mar 2009
Posts: 44
Rep Power: 17 |
Basically yes. It at least gives you an idea at which location the solver breaks down. If you find bad element-quality in this area then convergence might be helped by improving the mesh locally. Otherwise, try reducing your timestep...
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