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-   -   Help!! calculate gas density by ideal gas law (http://www.cfd-online.com/Forums/phoenics/72057-help-calculate-gas-density-ideal-gas-law.html)

Mahe January 24, 2010 09:36

Help!! calculate gas density by ideal gas law
 
Hello everyone
I want to calculate density of single gas by ideal gas law. In the polic of phoenics, the density was calculated by formula RHO1B*(p1+PRESS0)/(t1+TEMP0), where RHO1B was seemed to be the only parameter that should be given. However, when I choose ideal gas option in the material menu, there were anorther parameter which was GAMMA also should be given. I was very puzzled about the meaning of GAMMA. Could anyone give me a hint?
Thank you very much
Ma He

Linh.Hoang January 26, 2010 04:57

Hello Ma He,
itīs quite easy Gamma is the adiabatic index.
Gamma = Cp/Cv
where Cv is the specific heat at constant Volume and Cp is the specific heat at constant Pressure.

Linh


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