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Flow pattern in a Nozzle

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Old   February 2, 2009, 05:36
Default Flow pattern in a Nozzle
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I'm modeling the flow pattern in a De laval nozzle in a steady state. I met a problem when I changed the Gauge Pressure in Pressure outlet(Boundary condition):

---The final flow pattern doesn't change(Mach number, Static pressure) when i alter the outlet Gauge pressure in Boundary Condition panel.

Much appreciated!
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