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AUSM+ method at the sonic point

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Old   November 7, 2014, 10:30
Default AUSM+ method at the sonic point
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Ardalan
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I am solving 1d nozzle flow using ausm+ method
the results show a expansion shock at the throat (sonic point)
Is this normal?
by refining grid size, this unphysical shock diminishes.
but in the paper figure, using the same number of meshes, there is not any jump at the throat.
I'm really confused.
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