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-   -   General Unsteady solution convergence (http://www.cfd-online.com/Forums/main/10420-general-unsteady-solution-convergence.html)

Freeman December 7, 2005 18:08

General Unsteady solution convergence
 
Hi all!

I'm starting to simulate flows over bluff bodies (with Fluent) and they seem to be unsteady, because while running steady simulations, solutions don't converge: they keep oscillating periodically.

My question is, while running an unsteady simulation, the convergence is reached when my solution parameters, as Cd, Cl, mass-weighted averages start to oscillate? And how do I suppose residuals may behave? Do they also oscillate?? If they don't, how do you see you've reached the convergence in your unsteady simualations?

Thanks a lot!


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