# Bodenstein Number

Written by Jerry Ratzlaff on . Posted in Dimensionless Numbers

Bodenstein number, abbreviated as Bo, is a dimensionless number which is used in mass transfer and diffusion in reactors calculations in particular. The equations to calculate the Bodenstein Number are below.

## Formulas that use Bodenstein number

 $$\large{ Bo = \frac {v \; l} {D_a} }$$

### Where:

$$\large{ Bo }$$ = Bodenstein number

$$\large{ D_a }$$ = effective axial diffusivity

$$\large{ l }$$ = reaction length

$$\large{ v }$$ = velocity