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View Factor in Sphere - GATE ME '14

A solid sphere of radius r1 = 20 mm is placed concentrically inside a hollow sphere of radius r2 = 30 mm. The view factor F21 for radiation heat transfer is

A. 2/3 B. 4/9 C. 8/27 D. 9/4


Ans:

A solid sphere of radius r1 = 20 mm is placed concentrically inside a hollow sphere of radius r2 = 30 mm. The view factor F21 for radiation heat transfer is

reciprocity rule radiation view factor

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