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exists minimum grid size for Ansys calculation? |
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#1 |
New Member
Ahn
Join Date: Feb 2012
Posts: 1
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Hi dear.
I'm CFX user using LES which is turbulent model.. first attempt, minimum grid size is 1e-6 in used domain. calculation is complated. but......because of the problem of the y+ value... I adjusted minumum grid size = 4e-7 and then contect error. floating point overflow.. possible minumum grid size for CFX solver...exists? Sorry. please understand my English skills.. I look forward to your reponse.!!!!! |
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#2 |
Member
Join Date: Mar 2010
Posts: 42
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I don't know if it has something to do with it, but, are you using Double Precision on the solver?
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#3 |
Member
Max
Join Date: May 2011
Location: old europe
Posts: 88
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I don't think there is a minimum size for the elements or CVs. At least not in the range of 4e-7.
However, reducing the element size from 1e-6 to 4e-7 increases the number of nodes in a 3D grid approx. by a factor of 16. So if your original grid was already relatively large, maybe this could be a reason for the problem. |
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Tags |
ansys, cfx, grid, les |
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