期刊
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
卷 53, 期 13-14, 页码 2676-2679出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijheatmasstransfer.2010.02.042
关键词
Cheng-Minkowycz problem; Cellular porous medium; Radiative heat transfer; Temperature-dependent conductivity; Boundary layer
The Cheng-Minkowycz problem involving natural convection boundary layer flow adjacent to a vertical wall in a saturated cellular porous medium subject to Darcy's law is investigated. The problem is formulated as a combined conductive-convective-radiative problem in which radiative heat transfer is treated as a diffusion process. The problem is relevant to cellular foams formed from plastics, ceramics, and metals. The situation in which radiative conductivity is modeled utilizing the Stefan-Boltzmann law is investigated. If the temperature variation parameter, T(r), is equal to zero, the classical Cheng-Minkowycz solution is recovered. For a non-zero value of T(r) the results show that the reduced Rayleigh number is a decreasing function of T(r). (C) 2010 Elsevier Ltd. All rights reserved.
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