矩形容器内に置かれた二円筒回りの水の非定常自然対流 : 円筒間隔が水の冷却過程に及ぼす影響

概要

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Transient cooling of water around two cooled horizontal cylinders placed in a rectangular enclosure has been studied. The governing equations were solved by a finite difference method, and the flow structure and temperature distributions have been predicted. The purpose of the present study is to examine the effects of the spacing between the cylinders and the initial temperature of water on the cooling process of water. The initial water temperature was varied at 4,6,8 and 12℃, and timewise variations of the temperature field and the velocity field as well as the mean Nusselt numbers on the cylinder surfaces were compared. The effect of a change in the spacing between the cylinders on the cooling process appears earlier stage as the initial temperature of water is increased. Complicated flow patterns are observed for initial water temperatures larger than 4℃ due to the density inversion of water, irrespective of the extent of the spacing.
一般社団法人日本機械学会の論文
1998-08-25