Prandtl Number

Written by Jerry Ratzlaff on . Posted in Dimensionless Numbers

Prandtl Number

Prandtl Number ( \(Pr\) ) (dimensionless number) is used to calculate force by the ratio of momentum diffusivity (kinematic viscosity) and thermal diffusivities. 

Prandtl Number FORMULA

\(Pr= \frac{\nu} {\alpha}\)

Where:

\(Pr\) = Prandtl Number

\(\nu\) = kinematic viscosity

\(\alpha\) = thermal diffusivity

Solve for:

\(\nu =  Pr    \alpha  \)

\(\alpha = \frac { \nu  }{  Pr  }\)

 

Tags: Equations for Force