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Stokes' Formula

Viscosity force acting on a smooth sphere.

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The force of viscosity acting on a smooth sphere in stream line motion can be expressed with Stokes' formula:

F = 6 π η r v                                           (1)

where 

F = force (N)

η = viscosity of fluid

r = radius of sphere (m)

v= relative velocity between fluid and sphere (m/s)

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Related Topics

  • Fluid Mechanics

    The study of fluids - liquids and gases. Involving velocity, pressure, density and temperature as functions of space and time.

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