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November 12, 2010, 10:35 |
CFX meshing aspect ratio problems
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#1 |
New Member
Akash
Join Date: Nov 2010
Location: Southampton
Posts: 3
Rep Power: 15 |
Trying to mesh a wind tunnel in the CFX mesher and am getting warnings of aspect ratios greater than 50. What are acceptable aspect ratios for the mesh and how would i make it smaller.
Thanks |
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November 13, 2010, 04:35 |
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#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,703
Rep Power: 143 |
This is discussed in the CFX documentation, I think under obtaining convergence.
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November 13, 2010, 08:49 |
mesh aspect ratio
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#3 |
New Member
Join Date: Oct 2010
Posts: 18
Rep Power: 15 |
the acceptable range of mesh aspect ratio is below 100.
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November 13, 2010, 22:41 |
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#4 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,703
Rep Power: 143 |
The actual number depends on the flow you are simulating and where the element is in the flow. 100:1 is OK for single phase in the boundary layer adjacent to a wall where the flow is aligned with the element, but even 2:1 is not good enough for accurate surface tension models. I find sweeping statements like this useless.
Really you need to do a sensitivity study on it for your application. But if you describe the application we might be able to give you some tips based on our experience. |
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Tags |
ansys 12.1, aspect ratio, cfx, meshing |
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