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laval nozzle in navier stokes. No convergence
Posted May 25, 2012, 4:18 a.m. EDT Fluid & Heat, Studies & Solvers 0 Replies
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I want to simulate the velocity filed of a naval nozzle (a nozzle which narrows to a minimum width and than widen out again to get a velocity with mach>1)
I build it in 2D axial symmetry and revolve it to 3D. The problem is, that there is always an error like:
Error:
Failed to find a solution:
No convergence, even when using the minimum damping factor.
Returned solution has not converged.
I don't know where the problem is. So I build just a simple cylinder, but there it works perfectly. Then I narrow the cylinder in the middle just a little bit, but then I always get these errors. The more narrow it is and the finer the mesh is, the worse is the convergence.
But it should be possible to simulate a simple velocity through a channel with changing profile?...
Hello Tilmann John
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