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2D unstructured Euler solver

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Old   August 20, 2004, 05:46
Default 2D unstructured Euler solver
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I have developed a 2D unstructured Euler solver. It uses Roe Scheme (not high order, only first order). Time advancing is done using 4th R-K.

I am now testing it with NACA0012 airfoil. When inlet MA=0.8, the code failed because one cell near the sonic point at the upper wall has a negative pressure. Reducing the time step does not help at all.

I would like to know if there is anyone who has some experience in dealing with transonic computation. Esp. if the Roe scheme need some modification in transonic flow? Thanks a lot.

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