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-   -   supersonic/initial pressure (http://www.cfd-online.com/Forums/fluent/40912-supersonic-initial-pressure.html)

Ynot May 10, 2006 14:23

supersonic/initial pressure
 
Hi guys,

How does the supersonic/initial pressure in the mass flow inlet BC affect a compressible flow simulation? I couldn't find how fluent uses the value entered in this field.

I am getting a rather weird behavior. I have a propane inlet with a fixed mass flowrate and an initial pressure of 240 psi. When using these values, its giving me a 500 Psi pressure in the manifold from the tank to the combustion chamber! and then when it enters the chamber it becomes more of a physical value.

any help would be appreciated.



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