Reynolds Number - Pipe Flow
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Formula, assumptions, and limits
| Symbol | Meaning | Unit |
|---|---|---|
| Flow velocity | m/s | |
| Pipe inside diameter | m | |
| Kinematic viscosity | m²/s |
Source: Perry's Chemical Engineers' Handbook
In short
Reynolds number for pipe flow - the dimensionless parameter separating laminar (Re < 2300), transitional (2300\u20134000), turbulent (> 4000).