Steady-state error CFL dependence

July 23, 2008, 15:04

I have a question about solution error dependence on iteration "time" step or CFL number. I see DeltaT in the modified equations of some algorithms, but intuitively (to me anyway), for a steady-state flow shouldn't the result be independent of DeltaT?

July 28, 2008, 10:02

Hi,

For a Steady state problem your converged solution does not depends on the delta t (CFL) you choose, provided your code converges with the CFL you use. Steady state solution will be same for all CFL's if your solution has converged.

Thanks, Vinayender.

July 23, 2008, 15:04	Steady-state error CFL dependence	#1
David Guest Posts: n/a	I have a question about solution error dependence on iteration "time" step or CFL number. I see DeltaT in the modified equations of some algorithms, but intuitively (to me anyway), for a steady-state flow shouldn't the result be independent of DeltaT?

July 28, 2008, 10:02	Re: Steady-state error CFL dependence	#2
Vinayender Guest Posts: n/a	Hi, For a Steady state problem your converged solution does not depends on the delta t (CFL) you choose, provided your code converges with the CFL you use. Steady state solution will be same for all CFL's if your solution has converged. Thanks, Vinayender.

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