Flow Courant Number in Solution Controls
 

What does changing of the setting "Flow Courant Number" inside Solution Controls do? Or, is there a link to the theory behind this setting?

Flow Courant Number has an effect on convergence of my model (which is micron scale, FSI, and creeping flow) but I have trouble finding a good setting, and convergence is precarious.

I can't find it in the Fluent help either. Can Anyone tell me where to find what "Flow Courant Number" numerically means for steady state calculations?

I have posted a detailed explanation here:

http://www.cfd-online.com/Forums/flu...tml#post416529

Cheers
OJ

URF or Flow Courant Number
 

Thanks O.J.,

I'm wondering, if you set the underrelaxation to one value and the flow courant number to another, which one will Fluent use?

I have answered this question as well:

http://www.cfd-online.com/Forums/flu...tml#post420931

Try reading through the next posts after this post (up to post #20), there is some discussion.

OJ

Sorry to bring up tis old thread, but I think it's still relevant.


Just to make sure I get this right: Flow Courant Number and CFL is the same, right?

Yes, CFL and Courant Number are interchangeable. The mathematical representation may change a little for single phase or multiphase. You can check the Ansys manual for more information on the exact mathematical calculation.