how to set the material properties if I choose the real gas model

Springyuu · November 20, 2019, 03:32

The pressure in my calculation domain can change from 100Pa to 0.1Mpa，so the physical properties vary with pressure. If I choose a real gas model for the density of air, how should I set the other physical properties besides UDF ？

LuckyTran · November 20, 2019, 10:58

Each property has its own EOS. You can use real properties for density and still use constant properties or arbitrary for everything else.

Which properties are you discussing? What would you like them set to? Why is the word UDF even being mentioned at all?

Springyuu · November 20, 2019, 22:40

Quote:

Originally Posted by LuckyTran

Each property has its own EOS. You can use real properties for density and still use constant properties or arbitrary for everything else.

Which properties are you discussing? What would you like them set to? Why is the word UDF even being mentioned at all?

Thank you. I want to set the specific capacity, viscosity and thermal conductivity as a function of pressure.

November 20, 2019, 03:32	how to set the material properties if I choose the real gas model	#1
Springyuu New Member Springyuu Join Date: Nov 2019 Posts: 13 Rep Power: 6	The pressure in my calculation domain can change from 100Pa to 0.1Mpa，so the physical properties vary with pressure. If I choose a real gas model for the density of air, how should I set the other physical properties besides UDF ？

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November 20, 2019, 10:58		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,679 Rep Power: 66	Each property has its own EOS. You can use real properties for density and still use constant properties or arbitrary for everything else. Which properties are you discussing? What would you like them set to? Why is the word UDF even being mentioned at all?