Converging then Diverging Residuals???
Hello,
I was wondering if anyone has ever had any experience with residuals that intially start to converge and then after several iterations (i.e. 25,000+), they start to diverege??? I am working with the Reynolds Stress Model and I have decent convergence (1e-05) on everything except continuity (1e-2). In trying to get continuity to converge I let the simulation run and now at 25,000+ iterations I'm noticing that my Reynolds stresses, y-velocity, k and epsilon are starting to diverge slowly...Is the simulation adjusting itself in order to get the continuity to converge??? If it helps at all I'm simulating a flat plate boundary layer with super super fine mesh and low freestream intensity (0.2%). Any ideas??? Thanks so much, Erika |
Re: Converging then Diverging Residuals???
It is normal dont worry
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Re: Converging then Diverging Residuals???
So then should I allow the solution to progress??? Will it eventually converge???
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Re: Converging then Diverging Residuals???
yes. But not in absolute terms. It may start fluactuating between some value i.e diverging and converging. check the mass flow balance(it is ur gloval convergence)
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Re: Converging then Diverging Residuals???
Thanks for your help!
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Re: Converging then Diverging Residuals???
wats ur msn or yahoo id?
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Re: Converging then Diverging Residuals???
I don't have one.
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Re: Converging then Diverging Residuals???
which type of flow u r working on
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Re: Converging then Diverging Residuals???
I'm simulating a boundary layer experiment that was conducted in a wind tunnel with very low free stream turbulence intensity (0.02%). I'm actually trying to duplicate the turbulence intensity curves that Klebanoff published in his experiment from 1955 (Characteristics of Turbulence in a Boundary layer with Zero Pressure Gradient).
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