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9
Fundamentals of
Convection Heat Transfer
So far we have used Newton’s law of cooling, with some knowledge of convec-
tion heat transfer coefcient, to calculate convection heat transfer from a surface.
However, convection heat transfer coefcient varies from one ow to another and
depends on uid properties, ow geometry, surface dimensions and roughness, and
ow type. The relationship between convection heat transfer coefcient and ow
variables are illustrated in this chapter, and specic correlations for calculating
convection heat transfer coefcients in common ows will be given in Chapters 10
through 12.
9.1 TYPE OF FLOWS