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Solution Divergence when making Mesh smaller or finer

Posted 29 sept. 2017, 07:59 UTC−4 Electromagnetics, Computational Fluid Dynamics (CFD), Studies & Solvers Version 5.2 1 Reply

Enrico Freda
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I have Transient model which consists of Electrostatics , Transport of Diluted Species and Creeping flow modules, when I run the model with big mesh(coase one) COMSOL solves it eazily without any error but when I colve the same model and geometry with finer mesh it becomes divergence. How can I solve this problem?

1 Reply Last Post 29 sept. 2017, 08:55 UTC−4
Jeff Hiller COMSOL Employee

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Posted: 7 years ago 29 sept. 2017, 08:55 UTC−4
Updated: 7 years ago 29 sept. 2017, 09:01 UTC−4

Hi Enrico,

A likely cause is that your initial conditions are inconsistent with your boundary conditions. It can be easier for the software to recover from that with a coarse mesh than with a finer one. If that is not the problem, please post your mph file.

Best,

Jeff

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Jeff Hiller
Hi Enrico, A likely cause is that your initial conditions are inconsistent with your boundary conditions. It can be easier for the software to recover from that with a coarse mesh than with a finer one. If that is not the problem, please post your mph file. Best, Jeff

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