MathLiveReynolds number
The Reynolds number is a dimensionless ratio of inertial forces to viscous forces in a fluid flow, computed from flow speed, a characteristic length, and the fluid's viscosity. It is used to predict whether flow is laminar or turbulent and to compare flows that are dynamically similar.
\mathrm{Re} = \frac{v l}{\nu} = \frac{\rho v l}{\eta}What the symbols mean
| Reynolds number (dimensionless) | |
| flow speed (m/s) | |
| characteristic length (m) | |
| kinematic viscosity (m^2/s) | |
| mass density of the fluid (kg/m^3) | |
| dynamic viscosity of the fluid (Pa·s) |
About this formula
- FieldPhysics
- TopicFluid mechanics
- LevelUniversity
- Also calledReynolds number formula, fluid flow dimensionless number, laminar turbulent flow criterion, kinematic viscosity Reynolds number, dynamic viscosity Reynolds number
- SourceWikidata Q178932
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