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Old   August 21, 2014, 23:48
Exclamation Convergence problem?
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Johann
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Hello, this is my first post, i'm actually a new user to ANSYS FLUENT.

I'm in the design process of an airfoil, i did my mesh(ICEM) and the quality tells me i'm over 0.8 in all the mesh.

When i run the FLUENT analysis, it always converges on 0 to 12 AoA, even though i think i'm wrong the AoA vs Cl plots a very nice curve.

I don't really know if that's correct.

I used Trans SST coupled and second order upwind with pseudo transient active. When iterating approximately at 160 to 180 it converges, the residuals also converge.

help pls
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Old   September 15, 2014, 17:20
Default hi johan
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rahul kumar
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may be you can decrease your time step-size or select as adaptive instead of fixed and convergence also depends on courant number so you can check that as well
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convergence fluent, convergence issues, convergence problem, convergence problems, mesh and grid

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