# Bond Number

Written by Jerry Ratzlaff. Posted in Dimensionless Numbers

Bond number is a dimensionless number that represents the relationship of gravitational force to surface tension force.

## formula

$$Bo = \frac { \rho a L^2} {\sigma}$$

Where:

$$Bo$$ = Bond number

$$\rho$$ = density

$$a$$ = acceleration

$$L$$ = length

$$\sigma$$ = surface tension