C102 RADIATIVE-LAMINAR FREE CONVECTIVE HEAT TRANSFER IN A SQUARE ENCLOSURE WITH PARTICIPATING MEDIA BY SPECULARLY REFLECTING WALL(Radiation)

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概要

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• Investigated are the effects of specularly reflecting wall under the combined radiative and laminar free convective heat transfer in a square cavity. The absorbing and emitting gray medium is enclosed by the opaque diffusely emitting walls. The wall may reflecting diffusely or specularly. Boussinesq approximation is used for the buoyancy terms. The radiative heat transfer terms are evaluated using the direct discrete ordinates method. The parameters under considerations are Ra, N, τ, ε, and reflection mode. The differences caused by the reflection mode on the stream line, and temperature distribution and wall heat fluxes are studied. For Ra=0.92x10^6, the sizable differences are observed for the categories mentioned above if the order of N is less than about 10^<-3> for a medium not optically thin or optically thick. The differences at the side wall heat flux distributions are observed as long as the medium is optically thin. As the top wall emissivity decreases, the differences between these two modes are increased. As the optical thickness decreases at the fixed wall emissivity, the differences also increase. The specular reflection may promote the fluid motion.

• 一般社団法人日本機械学会の論文
• 2000-10-01

著者

• Byun Ki-hong

  Department Of Mechanical Engineering Dongguk University

関連論文

• C102 RADIATIVE-LAMINAR FREE CONVECTIVE HEAT TRANSFER IN A SQUARE ENCLOSURE WITH PARTICIPATING MEDIA BY SPECULARLY REFLECTING WALL(Radiation)

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