Turbulence & Rheology, Dr. D. Penney



REYNOLD'S NUMBER (Re) (Sir Osborne Reynolds, 1883)

  • Re = vDp/Eta ........ "2000"

    Where: D is diameter, v = velocity, p = density


  • or ..... Re = vrp/Eta ....... "1000"
    Where: r is radius


    (when axial flow velocity is used, the critical value is 2000 using r)

  • or ...... Re = Fp/r . pie . Eta
    Where: F is flow


    See Example of Reynold's Number

    See Greek Alphabet




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