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General Unsteady solution convergence

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Old   December 7, 2005, 18:08
Default General Unsteady solution convergence
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Freeman
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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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