Chapter 12 Radiation Heat Transfer12-17 The view factor between the two infinitely long parallel cylinders located a distance sapart from each other is to be determined. AssumptionsThe surfaces are diffuse emitters and reflectors.AnalysisUsing the crossed-strings method, the view factor between two cylinders facing each other for s/D> 3is determined to be DD(2) (1) sFsD sD12222−=−×=+−∑∑Crossed stringsUncrossed stringsString on surface 1(/)πor DsDsF⎟⎠⎞⎜⎝⎛−+=−2221212-18 Three infinitely long cylinders are located parallel to each other. The view factor between the cylinder in the middle and the surroundings is to be determined.
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