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Working out heat transfer flux in a pipe

  1. Feb 16, 2017 #1
    1. Question

    upload_2017-2-16_13-11-51.png



    2. The attempt at a solution

    upload_2017-2-16_13-24-0.png

    Now I'm not sure where to go next? Do I work out the local heat transfer coefficient at 1.2m or just the heat transfer coefficient? Using
    h = Nu × k/x
    or
    h = Nu × k/d

    Thanks, Sam.








     
  2. jcsd
  3. Feb 16, 2017 #2
    If you have turbulent flow, is there a significant thermal entrance region, or does the heat transfer coefficient level off over a very short distance into the pipe? Under what circumstances would you use Nu k/x?
     
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