多孔質層内の固-液相変化 : 水の密度逆転が矩形領域の融解過程に及ぼす影響

概要

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The effect of the density inversion of water on the melting process of ice in porous media confined in a rectangular cavity was numerically examined. The cavity consisted of a hot vertical side -wall and three insulated walls. In the calculations, the temperature of the hot wall was changed from 40℃ to 16℃, and the Darcy number from 4.01×10^<-5> to 5.01×10^<-6>. The timewise variations of the velocity field, the temperature field, the melting fraction and the mean Nusselt number over the hot wall were compared. Complicated flow patterns appeared for the hot wall temperatures of 8℃ and 12℃, and the mean Nusselt number over the hot wall became minimum for the hot wall temperature of 8℃. The change in the Darcy number largely affected the melting process for the hot wall temperature of 16℃ ; however, the change was very slight in the case of the wall temperature of 8℃.
一般社団法人日本機械学会の論文
1994-12-25