Lewis Number

Written by Jerry Ratzlaff on . Posted in Dimensionless Numbers

Lewis number is a dimensionless number giving the ratio of  thermal diffusivity to mass diffusivity.

formula

\(Le = \frac{  \alpha }{ D_m }\)

Where:

\(Le\) = Lewis number

\( \alpha \) = thermal diffusivity

\( D_m\) = mass diffusivity

Solve for:

\( \alpha = Le    D_m  \)

\(D_m = \frac{  \alpha }{ Le }\)