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Difference between Eckert number and Brinkmann Number

  1. Mar 11, 2014 #1
    So I do know that Br (Brinkmann number)=Ec.Pr (Eckert times Prandtl number)

    However, looking at the expressions for them,

    Ec=(U^2)/(Cp*(Tw-Tinf))

    Br=(μ*U^2)/(k*(Tw-Tinf))

    So What does (μ*U^2) (numerator for Brinkmann number) signify? Also, for the denominator in the Ec, Cp*(Tw-T) seems to be maximum enthalpy stored in the fluid. However, in Br we have (k*(Tw-Tinf)) in the denominator...which is basically the same amount of energy being conducted in...So what is the difference?
     
  2. jcsd
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