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Energy Balance problem

  1. Oct 9, 2015 #1
    Hello,
    I was reading an article, and I found something unfamiliar(sorry I am not into heat transfer a lot) : Laminar_flow.png

    For the energy balance of the fluid, I didn't understand the mCpθ where θ is the temperature and mCp(θ+dθ/dx θ) terms. I know that for a control volume, the energy balance for incompressible steady flow etc.. ΔH = Q = mCpΔθ. I know here we will have the same result at the end but the idea of taking these two terms as heat flux confused me.

    Thank you
     
  2. jcsd
  3. Oct 9, 2015 #2
    I can see what they are doing, but I don't like it being done this way either.

    Chet
     
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