Pressure and Temperature Dependent Dynamic Air Viscosity

  • #1
53
1
Hello,

I am currently working on a project which involves compressing air at high pressures and temperatures. I spent hours having a look for a pressure and temperature dependent equation for the dynamic viscosity of air but the only ones I could find were all temperature dependent only, such as the Sutherland Equation.

Does anybody knows of such equations ?

I would be looking for an equation fit to cover the ranges from 1 to 450 bars and 0 to 150 degrees Celsius.

Thank you for your help.
 

Answers and Replies

  • #2
21,949
4,996
Hello,

I am currently working on a project which involves compressing air at high pressures and temperatures. I spent hours having a look for a pressure and temperature dependent equation for the dynamic viscosity of air but the only ones I could find were all temperature dependent only, such as the Sutherland Equation.

Does anybody knows of such equations ?

I would be looking for an equation fit to cover the ranges from 1 to 450 bars and 0 to 150 degrees Celsius.

Thank you for your help.
Bird, Stewart, and Lightfoot, Transport Phenomena give a "corresponding states" graph of reduced viscosity as a function of reduced temperature and reduced pressure in Chapter 1. If this correlation is not adequate for you, you can track down the references they give in the chapter.
 
  • #3
53
1
Thank you ! That was exactly what I was looking for :)
 

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