射度法を用いた熱ふく射平衡に関する一考察

概要

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We propose a theoretical consideration of thermal radiative equilibrium by using a radiosity method. According to G. Kirchhoff′s research on cavity radiation, the condition of radiative equilibrium arises in the cavity in which the interior wall temperature is kept uniform. Furthermore, by considering the balance of energy on the wall surfaces in the cavity, a relationship “emittance ε = absorptance α” is obtained. In the present study, adversely, we developed a method to prove the conclusion “uniformity and uniqueness of radiative equilibrium in the cavity (independent of the emittance of the interior wall surfaces)” by considering the relationship “ε = α” on the wall surfaces to be a supposition. We proved by using a concept of radiosity that the radiosities on the interior wall surfaces can be kept uniform in the enclosed system of thermal radiative equilibrium. This knowledge is useful for the inspection of benchmarks of various programs for radiative analysis.
社団法人日本伝熱学会の論文
2011-01-01