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Help with Ill-conditioned preconditioner warning

Posted Jul 8, 2011, 7:29 p.m. EDT Version 4.1 1 Reply

James Anderson
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Hi all,
I am trying to model the effect of flowing water on a non-permeable membrane in a volume of water. The membrane is pushed upward by an applied pressure ranging from 1000 to 2000 Pa. The water flows over the membrane at a rate of 1L/hr.

When I try to solve the problem, however, I get an ill-conditioned preconditioner warning, which I assume is not good for the results. Also, the model does not converge for large applied pressures, which may or may not be a related problem.

I am a new comsol user, so let me know if anymore information is needed.

Thanks for any help, James

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1 Reply Last Post Jul 11, 2011, 2:24 p.m. EDT
James Anderson
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Posted: 1 decade ago Jul 11, 2011, 2:24 p.m. EDT
I seemed to have attached the wrong file. Here's the one i'm currently working on

Thanks for any help!
I seemed to have attached the wrong file. Here's the one i'm currently working on Thanks for any help!

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