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Old   June 29, 2009, 05:23
Default double mach reflection
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I am simulating a double mach reflection problem with higher order unstructured WENO scheme. When I use a less diffusive formulation, some vortical structures appear in the mach stem (middle one in the triple mach stem region). When I use a more robust and diffusive formulation, the structures are less prominent. But, this yields a smooth contour.

The literature doesnot mention which solution is correct and I guess it is impossible to get the exact same structure for two different schemes/grids.

Can anyone guide me which result is more valid? And how can one say if the scheme is good based on these results?

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