Convective heat transfer at altitude

  1. does the convective heat transfer coefficient of air change at high altitude (due to lower density/pressure) if so how much and how does it translate with forced convection
    http://www.engineeringtoolbox.com/convective-heat-transfer-d_430.html says
    10.45 - v + 10 * sqrt v = q
    but that doesnt work at high speed and thats not even for a different density of air
    any equations would be useful
     
  2. jcsd
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