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-   -   CFL criteria in 2D flow (http://www.cfd-online.com/Forums/main/67384-cfl-criteria-2d-flow.html)

meda August 13, 2009 10:34

CFL criteria in 2D flow
 
Dear all,
I know that CFL must be smaller than unity in an unsteady 1d calculation disregarding diffusion. But I wonder what the criteria is in a 2D flow (no diffusion) ?

Thanks in advance

vinayender August 14, 2009 09:02

in 2D its same

but in the CFL number lambda will be the wave speed normal to the face on which you are computing the flux.


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