What should I do to accelerate the solution
I have a very long elbow tube. Convergence is too slow(by mass eq). How could I accelerate the convergence.
StarCD 3.26 Regards! |
Re: What should I do to accelerate the solution
Maybe use the traditional approach: Starting of with a 1'st order solver scheme, then switch to 2'nd order later. Try to adjust the under relaxation factors to a lower level. It might help.
Convergence on mass is generally slow. |
Re: What should I do to accelerate the solution
You might have to create a more suitable mesh.
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Re: What should I do to accelerate the solution
try amg solver
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Re: What should I do to accelerate the solution
If you are using second order differencing schemes, convergence will be slower in the beginning. But after reaching a stable stage, low relaxation factor doesn't help much and can be increased upto some level. But upto what level it is safe, i can't say as it depends very much on mesh, geometry and differencing scheme.
you can dynamically change the relaxation factor after a stable residual is reached. |
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