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FOURIER Law of conduction

  1. Apr 29, 2012 #1
    Using Fourier’s law and an electrical analogy, derive the expression given below for the heat flow, Q, through a flat composite wall of surface area, A, with three layers of thicknesses x1, x2 and x3 and thermal conductivities k1, k2 and k3, and an overall temperature difference ΔT. State any assumptions.
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     

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  3. Apr 29, 2012 #2

    tiny-tim

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    Welcome to PF!

    Hi Jay! Welcome to PF! :smile:
    What do you think the electrical analogy is? :wink:

    (and what is Fourier's law?)
     
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