MathLiveStokes' law
Gives the viscous drag force on a small sphere moving slowly through a viscous fluid at low Reynolds number. It is used in fluid mechanics and in methods such as falling-ball viscometry.
F_{\mathrm{D}} = 6 \pi \eta r vWhat the symbols mean
| drag force on the sphere (N) | |
| dynamic viscosity of the fluid (Pa·s) | |
| radius of the sphere (m) | |
| relative velocity between sphere and fluid (m/s) |
About this formula
- FieldPhysics
- TopicFluid mechanics
- LevelUniversity
- Also calledStokes drag, drag force on a sphere, viscous drag on a small sphere, frictional force sphere viscous fluid, Stokes drag formula
- SourceWikidata Q824561
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