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Inviscid solver and vorticity

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Old   August 25, 2010, 06:54
Default Inviscid solver and vorticity
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Hello,

I would like to know if there is any numerical diffusion or induced vorticity in the inviscid solver in Fluent. Because I get 2D vortex shedding but I am not sure where the vorticity comes from. Unless the shedding is inviscid?

Thanks.
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Old   October 5, 2010, 09:14
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1st order upwind and 2nd order upwind spatial discretization schemes (both available in Fluent) introduce some numerical diffusion. The diffusion will be reduced if using the second-order scheme.

Vortex shedding with an inviscid solver is a purely numerical phenomenon.
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