Consider the directionally selective surface having the directional emissivity ??, as shown. Assuming that the surface is

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Consider the directionally selective surface having the directional emissivity ??, as shown. Assuming that the surface is isotropic in the ? direction, calculate the ratio of the normal emissivity ?n, to the hemispherical emissivity ?h,

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Fundamentals of Heat and Mass Transfer

ISBN: 978-0471457282

6th Edition

Authors: Incropera, Dewitt, Bergman, Lavine

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Question Posted: Mar 02, 2011 12:59 AM

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Consider the directionally selective surface having the directional emissivity ??, as shown. Assuming that the surface is

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45° 0.8 0. 0.3

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KNOWN Directional emissivity of a selective surface FIND Ratio of the norm...View the full answer

Fundamentals of Heat and Mass Transfer

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