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convergence problem.

Posted 2011年1月18日 GMT-5 09:00 Fluid & Heat Version 3.5a 1 Reply

Byungdal So
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this is free convection model,

but I don't know why this model does not converge.

do you guys have any idea?

thank you

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1 Reply Last Post 2011年1月18日 GMT-5 16:26
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 2011年1月18日 GMT-5 16:26
Hi

I'm not a CFD specialist, but you have a singularity at the lower left corner of your model:

Two adjacent BC's with two different temperatures.

Perhaps you sould leave a small region with thermal isolation down there at least 2-3 mesh elements wide or height, horizontally or vertically

I cannot see anything else obvious for me ;)

--
Good luck
Ivar
Hi I'm not a CFD specialist, but you have a singularity at the lower left corner of your model: Two adjacent BC's with two different temperatures. Perhaps you sould leave a small region with thermal isolation down there at least 2-3 mesh elements wide or height, horizontally or vertically I cannot see anything else obvious for me ;) -- Good luck Ivar

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