Experiments have been conducted to determine localheat
Chapter 6, Problem 6.10(choose chapter or problem)
Experiments have been conducted to determine localheat transfer coefficients for flow perpendicular to along, isothermal bar of rectangular cross section. Thebar is of width cparallel to the flow, and height dnor-mal to the flow. For Reynolds numbers in the range104?Red?5?104, the face- averagedNusselt num-bers are well correlated by an expression of the formThe values of Cand mfor the front face, side faces, andback face of the rectangular rod are found to be the fol- lowing:Facec/dCmFront 0.33 ?c/d?1.33 0.674 1/2Side 0.330.153 2/3Side 1.330.107 2/3Back 0.330.174 2/3Back 1.330.153 2/3Determine the value of the average heat transfer coeffi-cient for the entire exposed surface (that is, averaged overall four faces) of a c?40-mm-wide, d?30-mm-tall rec-tangular rod. The rod is exposed to air in cross flow atV?10 m/s, T??300 K. Provide a plausible explanationof the relative values of the face- averaged heat transfercoefficients on the front, side, and back faces
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