Help!! calculate gas density by ideal gas law

Mahe · January 24, 2010, 08:36

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, 03:57

Hello Ma He,
it´s 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

January 24, 2010, 08:36	Help!! calculate gas density by ideal gas law	#1
Mahe New Member Mahe Join Date: Mar 2009 Posts: 5 Rep Power: 17	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

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January 26, 2010, 03:57		#2
Linh.Hoang New Member Join Date: May 2009 Location: Germany Posts: 25 Rep Power: 16	Hello Ma He, it´s 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