E2.22 Gas Viscosity at High Pressure

Example 2.22: Calculate viscosity of nitrogen at 80 bar and 300 °K. Liquid density at critical conditions, d_c, is 0.311 g/cm³, and viscosity of nitrogen at low pressures is η^o = 178.78 μP

Solution

Pressure, P = 78.395 atm

Critical volume, V_c

Specific volume, V:

Reduced volume, V_r

Reduced density, ρ_r

Viscosity difference group, f₄(ρ_r) (Equation 2.66):

Viscosity difference η - η^o (Equation 2.66):