Entropy condition

May 10, 2008, 05:46

Hi,

I have a general question about the entropy condition. I heard, that the central differencing schemes violates the entropy condition, but the upwind does not. Is this true, for all kind of flows, or just for compressible flow? So far I actually thought, that I should use central differencing for my incompressible flows, whenever it does not oscillate (fine enough mesh)!? Is there any engineering cfd book, where I find some more explanation? Would be nice, if you have some hints...

Thanks! Flo

May 13, 2008, 15:11

Hi,

me again... is this a stupid question or does no one have an idea!?

Flo

May 10, 2008, 05:46	Entropy condition	#1
Flo Guest Posts: n/a	Hi, I have a general question about the entropy condition. I heard, that the central differencing schemes violates the entropy condition, but the upwind does not. Is this true, for all kind of flows, or just for compressible flow? So far I actually thought, that I should use central differencing for my incompressible flows, whenever it does not oscillate (fine enough mesh)!? Is there any engineering cfd book, where I find some more explanation? Would be nice, if you have some hints... Thanks! Flo

May 13, 2008, 15:11	Re: Entropy condition	#2
Flo Guest Posts: n/a	Hi, me again... is this a stupid question or does no one have an idea!? Flo

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