Consider the radiation heat exchange inside an annulus between two very long concentric cylinders. The radius of the outer cylinder is R 0 and that of the inner cylinder is R i . The radiation view factor of the outer cylinder onto itself is

1− ( {R_{i}}/{R_{0}}) ^{1\/ 3}

GATE Mechanical Engineering (ME) 2016 Shift 2 Solved Paper

Question : 26 of 65

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Consider the radiation heat exchange inside an annulus between two very long concentric cylinders. The radius of the outer cylinder is R₀ and that of the inner cylinder is R_i. The radiation view factor of the outer cylinder onto itself is

$1−√{\;{R_{i}}/{R_{0}}}$
$√{1−\;{R_{i}}/{R_{0}}}$
$1− (\;{R_{i}}/{R_{0}}) ^{1\/ 3}$
$1−\;{R_{i}}/{R_{0}}$

Validate

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