PRANDTL
The PRANDTL function returns the dimensionless Prandtl number for the specified fluid defined as
Pr=mu * Cp / k
where
mu is the viscosity
Cp is the specific heat
k is the thermal conductivity
The Prandtl function requires temperature as an input for ideal gas and incompressible substances and temperature and pressure for real substances.
Examples:
$UnitSystem SI C kPa mass
Pr_1=Prandtl(Air,T=100 [C])
Pr_2=Prandtl(Steam,T=100 [C],P=50 [kPa])
Pr_3=Prandtl(Dowtherm_A,T=25 [C])
{Solution:
Pr_1=0.7118
Pr_2=0.9876
Pr_3=484.6
}