Reynolds number for pipe flow - the dimensionless parameter separating laminar (Re < 2300), transitional (2300–4000), turbulent (> 4000).
Formula
$$ Re = \frac{v D}{\nu} $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $v$ | Flow velocity | m/s | Q/A |
| $D$ | Pipe inside diameter | m | pipe schedule |
| $\nu$ | Kinematic viscosity | m²/s | fluid temperature |
Sources
- Perry’s Chemical Engineers’ Handbook.