多孔板フィンによる融解促進と一様化に関する実験的研究  [in Japanese] Experimental Study of Melting Improvement and Uniformalization by Perforated Fins  [in Japanese]

垂直加熱板を有する容器内の融解促進,一様化をフィンを使用して実験的に検討するものである.n-オクタデカンを媒体にし,融解状態を(1)フィンなし,(2)ソリッド型フィンを設置した場合,(3)多孔板型フィンを設置した場合,に対し経過時間とともに比較した.フィンの寸法は自然対流の影響を考慮し,容器下部で長く,上部になるに従い短くなっている.その結果,多孔板型フィンでも孔が加熱板にかかっている場合がより融解が促進された.ソリッド型フィンでは拡大伝熱面の効果はあるが,融解が進むと逆に対流抑制の効果になる.それを多孔板型フィンでは孔の中を液体が対流で移動し,特に容器下部の加熱板付近ではその効果が著しい.

Improvement and uniformalization of melting from a vertical heated plate imbedded in a paraffin (n-octadecane) was experimentally studied by using fins. The shapes of melting front was determined photographically for (1) without fins, (2) solid-type fins and (3) perforated fins and the melting rate was compared with each other. The size of fins is short at the upper part of a vertical heated plate and is long at the lower part of the plate considering on the effect of natural convection. The melting is enhanced for the perforated fins whose holes contact to the heated plate. Solid-type fins have an extended surface effect, but natural convection is depressed with melting. In the case of perforated fins, melted liquid moves through the holes. Therefore, the effect is remarkable near the lower section of the vertical heated plate.