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-   -   convergence criterium for unsteady 3D VOF (http://www.cfd-online.com/Forums/fluent/72875-convergence-criterium-unsteady-3d-vof.html)

jack1980 February 20, 2010 04:29

convergence criterium for unsteady 3D VOF
 
Hello,

My objective is to calculate the drag coefficient on a free-surface ship. I would like to do this on three grids (coarse, medium, fine) and make a Richardson Extrapolation.

So now I get a time-history of the cd for each grid. I am wondering what would be the best convergence criterium? How do I proceed to find an appropiate and comparable cd for each grid? Where could I find information on this subject?

Thank you very much!

vmeertens February 28, 2010 07:49

Hi,

I'm doing the same research as you. I have to calculate the lift and drag on a speedboat using VOF. I have some results but i'm not sure if they are 100% correct.
If you want i can send you how i did the calculations. Maybe we can compare them to see if it's correct.

Vincent

jack1980 February 28, 2010 10:04

Great, I've sent you an email.


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