# Galileo Number

Written by Jerry Ratzlaff on . Posted in Dimensionless Numbers

## Galileo Number

Galilei Number ( $$Ga$$ ) (dimensionless number) is a ratio of forces present in the flow of viscous fluids.  It is used in the momentum of heat transfer, viscous flow, thermal expansion.

### Galilei Number FORMULA

$$Eu = \frac{ g \; \dot \; l^3 \; \dot \; \mu^2 } { \rho^2 }$$

Where:

$$Ga$$ = Galileo Number

$$g$$ = gravitational acceleration

$$l$$ = characteristic length

$$\nu$$ (Greek symbol nu) = viscosity

$$\rho$$ (Greek symbol rho) = density