convective heat transfer coeficient of air
convective heat transfer coeficient of air
(OP)
What is a good number to use for the convective heat transfer coeficient of air? I'm assuming *relatively* "stagnant" air...although I guess if the air really was 100% stagnant it wouldn't convect at all...
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RE: convective heat transfer coeficient of air
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RE: convective heat transfer coeficient of air
Plastics Industry
RE: convective heat transfer coeficient of air
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RE: convective heat transfer coeficient of air
Holman's Heat Transfer (McGraw-Hill) 1976, pp 263, gives for air natural convection on vertical plain or cylindrical surfaces, at atmospheric pressure, the following estimates for the convection coefficient h:
laminar : h = 1.42(ΔT/L)0.25
turbulent: h = 0.95(ΔT)0.33
h, W/m.K
ΔT, K
L, vertical dimension, m
Turbulence defined when Gr.Pr > 109
RE: convective heat transfer coeficient of air
http://www.frigprim.com/online/natSinglePlate.html
For temperature differences of less than 5ºC, the htc is less than 2.5 W/m^2-K
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