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Simone June 29, 2005 03:07

Convergence problems
I'm currently experiencing some problems in reaching the convergence in STAR-CD calculations. I have already tryed to reduce the mesh size and/or to change the boundary conditions to help reducing the residual values, but after some iterations, they always start obscillating between 10^-1 and 10^-2.

Is there any trick I can use to solve this problem?

Thanks a lot.


4xF June 29, 2005 06:50

Re: Convergence problems
Is your problem really steady-state?

Simone June 29, 2005 07:27

Re: Convergence problems
Yes! It is a really steady-state problem!

Can you help me, please?


4xF June 29, 2005 09:10

Re: Convergence problems
To me it looks like your problem may be a REAL transient and you try to enforce a steady-state solution. That may be the reason why you cannot get a converged solution, because the flow physics may be wrong.

Simone June 29, 2005 10:03

Re: Convergence problems
It's possible! How can I have a transient solution?

4xF June 29, 2005 10:48

Re: Convergence problems
Change the analysis type from steady-state to transient?

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