Pipe head-loss from Darcy-Weisbach equation - the fundamental pipe-friction calculation for any fluid system.
Formula
$$ h_f = f \cdot \frac{L}{D} \cdot \frac{v^2}{2g} $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $L$ | Pipe length | m | piping iso |
| $D$ | Inside diameter | m | pipe schedule |
| $v$ | Mean velocity | m/s | Q/A |
| $f$ | Darcy friction factor | - | Moody chart |
Sources
- Moody L.F. - ASME 1944.