# Bejan Number - Mass Transfer

Bejan number - mass transfer, abbreviated as Be, a dimensionless number, is the pressure drop along a channel of length.

## Formulas that use Bejan Number - Mass Transfer

\(\large{ Be = \frac{ \Delta p \; l^2 }{ \mu \; D_m } }\) |

### Where:

\(\large{ Be }\) = Bejan number

\(\large{ l }\) = channel of length

\(\large{ D_m }\) = mass diffusivity

\(\large{ \mu }\) (Greek symbol mu) = dynamic viscosity

\(\large{ \Delta p }\) = pressure drop

Tags: Equations for Pressure