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December 4, 2012, 02:24
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residuals not converging
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#1 |
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Member
liladhar
Join Date: May 2012
Posts: 35
Rep Power: 14  |
hi there,
i have an offshore structure(TLP-tension leg platform). when i am running simulation in star ccm+ i am unable to converge the solution. the inial residual for momentum(x,y,z) are high. after reducing the under-relaxation factors also, all in vein. please help. |
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December 4, 2012, 22:11
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#2 |
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Member
John
Join Date: Aug 2009
Posts: 92
Rep Power: 17 |
Do you have any plots to show? What is your problem setup? Is it a steady/unsteady sim?
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December 13, 2012, 01:53
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residuals not converging
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#3 |
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Member
liladhar
Join Date: May 2012
Posts: 35
Rep Power: 14 |
hi there,
i am attaching the residual graphs. plz help |
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December 13, 2012, 04:06
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#4 |
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Senior Member
siamak rahimi ardkapan
Join Date: Jul 2010
Location: Copenhagen, Denmark
Posts: 220
Rep Power: 18 |
It seems the problem is because of low mesh quality.
But before that go to Continua/physics, click on the flow and turbulence model. Change them from second order to first order. If it started converging, let converge until getting uniform horizontal lines, then again change to second order. Hope it will work
__________________
Good luck Siamak |
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| Tags |
| convergence, residuals., tlp |
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