過冷却をともなう凝固過程の研究 : 過冷却解消温度におよぼす伝熱面の影響の測定と統計的処理

概要

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Basic experiments and statistical analysis were performed concerning the effects of cooling surface properties on the degree of supercooling. In experiments, pure water layers were cooled from the top by five kinds of copper cooling surfaces (electrolytic polished, buffed, gold-plated, nickel-plated and porous copper disks) under various cooling rates, and the degrees of supercooling at the appearance of dendritic ice were measured. The results were compared under a statistical concept to discuss the effects of cooling surface properties on the mean degree of supercooling. As a result, the porous surface showed the lowest degree of supercooling. Next in the analysis, a method to estimate the probability of ice appearing on a cooling surface was proposed. The probabilities for the above surfaces were calculated as the functions of the surface temperature.
社団法人日本機械学会の論文
1988-06-25