Simulation of CD Nozzle with OpenFOAM.
Solver: rhoCentralFoam
OutletBC: waveTransmissive with lInf = 5
A pressure wave forms and is transmitted towards the outlet. At the outlet, there is a conflict between the BC and the pressure wave. This is way there is a drastic increase ing pressure.
Discussion:
http://www.cfd-online.com/Forums/openfoam-solving/62994-courant-number-become...
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