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-   -   Convergence problem Fluent refined mesh (http://www.cfd-online.com/Forums/fluent/123435-convergence-problem-fluent-refined-mesh.html)

costy September 12, 2013 13:21

Convergence problem Fluent refined mesh
 
1 Attachment(s)
[I've done a cylinder of 400m. I've done a mesh of 7 cm t-grid and my problem converged. Now I've scaled the cylinder using a ratio 1 : 20 but there are residual oscillations. These are shown in the image ATTACH]25320[/ATTACH].
I'm using k epsilon standard and my problem is steady. So how can I resolve this problem?

jdrch September 14, 2013 16:35

Quote:

Originally Posted by costy (Post 451387)
Now I've scaled the cylinder using a ratio 1 : 20

Make sure your scaling is isotropic (equal ratio in all directions), or you may have created bad elements.

Also, ensure you scaled before setting up the rest of your case so that your boundary conditions don't get mismatched (they shouldn't, but the Fluent documentation recommends it).

costy September 15, 2013 06:24

thanks a lot or your help :)

jdrch September 15, 2013 13:57

No problem!


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