class 34 - Click to edit Master subtitle style Radiation...

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Unformatted text preview: Click to edit Master subtitle style Radiation Exchange Between Surfaces: Chapter 13 Sections 13.1 through 13.2 Basic Concepts Basic Concepts • Enclosures consist of two or more surfaces that envelop a region of space (typically gas-filled) and between which there is radiation transfer. • A nonparticipating medium within the enclosure neither emits, absorbs, nor scatters radiation and hence has no effect on radiation exchange between the surfaces. • Each surface of the enclosure is assumed to be isothermal , opaque , diffuse and gray , and to be characterized by uniform radiosity and irradiation . Virtual , as well as real, surfaces may be introduced to form an enclosure. View Factor Integral The View Factor (also Configuration or Shape Factor) • The view factor, Fij is a geometrical quantity corresponding to the fraction of the radiation leaving surface i that is intercepted by surface j . . ij F Consider exchange between differential areas i : j dA and dA • The view factor integral provides a general expression for...
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This note was uploaded on 08/13/2011 for the course CHEM 3210 taught by Professor Degrazia during the Fall '10 term at Colorado.

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class 34 - Click to edit Master subtitle style Radiation...

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