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Forced Convection - Heat transfer equation

  1. Nov 3, 2012 #1

    Wondering if anyone can help me towards finding an equation to calculate the heat transfer due to forced convection? Can't seem to find a good source for one at all, needs to be referenced for my MEng project.

    Currently have for natural convection:

    Q = h A (ΔT)

    Thank you

  2. jcsd
  3. Nov 3, 2012 #2


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    Science Advisor
    Homework Helper

    The formula is basically the same. The real question is how to find the value of h. That depends very much on the geometry of the system, the flow rates, whether there are devices to increase turbulence in the flow, etc.

    You should be able to find some formulas (usually based on correlations) for different forced convection situations. They are often given in terms of non-dimensional parameters like the Reynolds, Nusselt, Prandtl, and Grasshof numbers for the flow, rather than in "physical units".
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