Experiments to determine the local convection heattransfer
Chapter 6, Problem 6.14(choose chapter or problem)
Experiments to determine the local convection heattransfer coefficient for uniform flow normal to a heatedcircular disk have yielded a radial Nusselt number dis-tribution of the formwhere both nand aare positive. The Nusselt number atthe stagnation point is correlated in terms of theReynolds (ReD?VD/?) and Prandtl numbersObtain an expression for the average Nusselt number,D?D/k,corresponding to heat transfer from anisothermal disk. Typically, boundary layer developmentfrom a stagnation point yields a decaying convectioncoefficient with increasing distance from the stagnationpoint. Provide a plausible explanation for why theopposite trend is observed for the disk.
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