Chapter 10 Boiling and Condensation10-42 The hydraulic diameter Dhfor all 4 cases are expressed in terms of the boundary layer thickness δas follows: (a) Vertical plate: DApwwhc===444δ(b) Tilted plate: DApwwhc=444(c)Vertical cylinder: DApDDhc=444πδπ(d) Horizontal cylinder: DApLLhc=44224()(e) Sphere: DApDDhc=444Therefore, the Reynolds number for all 5 cases can be expressed as Re&==444mpApDlclllhllllllμρδρVVV10-43 There is film condensation on the outer surfaces of N horizontal tubes arranged in a vertical tier. The value of N for which the average heat transfer coefficient for the entire tier be equal to half of the value for
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This note was uploaded on 01/24/2012 for the course PHY 4803 taught by Professor Dr.danielarenas during the Fall '10 term at UNF.