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What is the S-coefficient in Magnus Effect?

  1. Nov 4, 2013 #1
    Hello,
    I am studying Magnus Effect for the first time, I would like some help here, please.

    The formula for Magnus effect as shown was:

    [F][/m] = S (v × ω)

    Where v = velocity of fluid,
    ω = angular velocity,
    S = air resistance coefficient across the surface of sphere.

    How can I find the value of S? Is it fixed or does it need another formula?

    Thank you for your help in advance. :)
     
  2. jcsd
  3. Nov 4, 2013 #2

    Simon Bridge

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    You pretty much have to measure it.
    It depends on things like the temperature, pressure, viscosity and constituents of the fluid and the roughness of the surface.

    Within narrow sub-fields there will be tables of values.
     
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