Reynolds Number
Re = ρ·v·D / μ
What it says
The Reynolds number is the ratio of inertial to viscous forces and predicts whether flow will be laminar or turbulent.
Symbols
| Symbol | Quantity | Dimension |
|---|---|---|
Re | Reynolds number (dimensionless) | 1 |
ρ | Fluid density (kg/m^3) | M L^-3 |
v | Flow speed (m/s) | L T^-1 |
D | Characteristic diameter (m) | L |
μ | Dynamic viscosity (Pa·s) | M L^-1 T^-1 |
Work it out
Enter what you know. No account needed.
Connects to
Filed under Fluid dynamics · derive through it in the explorer