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.