# Hydraulic Radius of a Partially Full Pipe (Less than Half Full)

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

## Formulas that use Hydraulic Radius of a Partially Full Pipe (Less than Half Full)

 $$\large{ r_h = \frac { A_c } { P } }$$

### Where:

$$\large{ r_h }$$ = hydraulic radius

$$\large{ A_c }$$ = area cross-section of flow

$$\large{ P }$$ = wetted perimeter