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January 31, 2018, 21:41
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Convergence issue with a sawtooth pattern
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#1 |
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New Member
Eric Lee
Join Date: Jul 2017
Posts: 10
Rep Power: 8  |
Hello,
I'm trying to simulate a wind-tunnel experiment where a 4 coaches train is put. The boundary conditions are all no-slip walls except for the inlet, outlet, and the symmetry one inside. The problem I have is that the convergence monitor shows that the solver seems to have a sawtooth pattern around from 30th iteration. my question is, is it allowable to use the data acquired from this kind of result or not. on the internet it says this problem could happen if the mesh is too coarse, but the number of elements is around 22 million in my case. I would appreciate if you share your knowledge on this. Thank You. |
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February 1, 2018, 01:14
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#2 |
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Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,703
Rep Power: 143 |
This is a FAQ: https://www.cfd-online.com/Wiki/Ansy...gence_criteria
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Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum. |
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