Radiative Heat Transfer in Fibrous Insulations—Part I: Analytical Study

[+] Author and Article Information
T. W. Tong

Department of Mechanical Engineering, University of Kentucky, Lexington, Ky. 40506

C. L. Tien

Department of Mechanical Engineering, University of California, Berkeley, Calif. 94720

J. Heat Transfer 105(1), 70-75 (Feb 01, 1983) (6 pages) doi:10.1115/1.3245561 History: Received February 05, 1982; Online October 20, 2009


The purpose of this work is to develop models for predicting the radiant heat flux in lightweight fibrous insulations (LWFI). The radiative transport process is modeled by the two-flux solution and the linear anisotropic scattering solution of the equation of transfer. The radiative properties of LWFI consistent with these solutions have been determined based on extinction of electromagnetic radiation by the fibers. Their dependence on the physical characteristics of fibrous insulations has been investigated. It has been found that the radiant heat flux can be minimized by making the mean radius of the fibers close to that which yields the maximum extinction coefficient. The results obtained in this study are useful to those concerned with the design and application of LWFI.

Copyright © 1983 by ASME
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