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Why do most of the compressible solvers diverge at flows > Ma 5?

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Old   February 16, 2010, 20:28
Default Why do most of the compressible solvers diverge at flows > Ma 5?
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Alan Harrland
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I am trying to model a cone in a supersonic flow field, I have attached an image of my mesh for information.

I have tried to model this situation with an inlet Mach number of Ma = 7, but every solver I try diverges at these flight conditions. Below are some images from sonicFoam (ras turblence) and rhopSonicFoam (inviscid) respectively.


Why do these diverge at flows greater than Ma = 5? Can anyone help me out here please?

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