多孔質層内の固-液相変化 : フィン付き伝熱面の姿勢が融解過程に及ぼす影響

抄録

Solid/liquid phase-change heat transfer in porous media has been extensively studied in the past several years, and effects of various parameters on the heat transfer have been examined. In the melting process, natural convection plays an important role to determine the melting rate and the phenomenon becomes complicated. This is quite different from the solidification problems in which heat conduction usually dominates the process. As far as the authors could determine, no studies appear to have been reported on the effect of the orientation of a hot surface with fins, which is reliable and effective for the heat transfer enhancement, on the melting process, despite of the fact that it greatly affects the natural convection and the melting rate. In the present study, calculations have been performed for melting processes around a hot wall with fins using a numerical method which the authors recently proposed. And, the effect of the orientation of the hot surface on the effectiveness of the attached fins has been examined.