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divergence in AMG solver

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Old   January 7, 2008, 09:02
Default divergence in AMG solver
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I'm doing a 3D transient simulation of a compressor (with non iterative time advancement) I get an error after 18599 iterations: "divergence in AMG solver: temperature". What is quite strange is the moment at which it happens: 18599 because at the 18600th, it normally needs to write my .cas and .dat file (every 200 timesteps). I don't know if it is casuality but in all the cases: can someone help me on the problem?
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Old   January 22, 2008, 05:04
Default Re: divergence in AMG solver
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please send me cause of divergence and how we can solve this problem.

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Old   February 8, 2008, 18:19
Default Re: divergence in AMG solver
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One cause is negative cell volumes. Try grid->check. Look for a negative volume, if so there's your problem and you must re-mesh with much better quality elements.

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