CFD Online Discussion Forums

CFD Online Discussion Forums (
-   CFX (
-   -   CFX meshing aspect ratio problems (

akash_morar November 12, 2010 11:35

CFX meshing aspect ratio problems
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.


ghorrocks November 13, 2010 05:35

This is discussed in the CFX documentation, I think under obtaining convergence.

dada1204 November 13, 2010 09:49

mesh aspect ratio
the acceptable range of mesh aspect ratio is below 100.

ghorrocks November 13, 2010 23:41

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.

All times are GMT -4. The time now is 06:38.