Equation of state, gas model for hypersonics at mid-low altitude -- CFD Online Discussion Forums

May 18, 2017, 06:06	Equation of state, gas model for hypersonics at mid-low altitude	#1
taillanm Member Join Date: Nov 2015 Posts: 57 Rep Power: 10	Hi all, I am interested in hypersonics of a body but can't decide which gas model to use. My operating point is: Pressure: 10e4Pa, T: 260K and Mach 9. From the user guide, the real gas "equilibrium air" model isn't appropriate (pressure < 10^2). Should I use the ideal gas model instead of using constant thermodynamic properties values I find them f(T)? Cheers

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