|August 18, 2009, 01:58||
Join Date: Aug 2009
Posts: 13Rep Power: 9
There is a compressor which working in vacuum conditions. Also take N2 from 0.01 [mbar] (this is absolute pressure) and i want to model this in CFX.
My boundary conditions are;
inlet=0.01 mbar static pressure
outlet= 0.0125 kg/s
Pref= 0 [atm]
But pressure contours on CFX-Post i see negative pressure values about -2.5 [bar] this is physically not valid. Because environment is 0.01 [mbar] absolute pressure.
Does anyone have a suggestion for me?
|August 18, 2009, 18:20||
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 12,545Rep Power: 97
I assume you are running a compressible flow. I can't see how you would get negative absolute pressures as the density is undefined and therefore the solver would diverge. Are you sure you have your reference pressure set correctly?
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