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-   -   Compressible flow over airfoil (http://www.cfd-online.com/Forums/fluent/68741-compressible-flow-over-airfoil.html)

student123a September 30, 2009 10:52

Compressible flow over airfoil
 
Hi
I have an airfoil mesh, and its overall boudary is set to velocity inlet. I want to run a compressible flow analysis, so i changed the boundary to pressure-far-field (in fluent). i tried to run the compressible problem based on the fluent tutorial (tut.3 from ansys) and inputted the same commands.

But the iterations fail, with the message "amg solver error". Does anyone know how i can solve this problem?

i have tried changing some of the solution conditions but i am getting very inaccurate resluts.

thanks!

owais70 October 1, 2009 16:33

1. Check mesh
2. Try changing the solver
3. Try relaxing URFs

makaero October 1, 2009 19:07

check mesh for errors

do case check before iterating


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