Study of Melting of a Ice Layr with a Combined Effect of Temperature and Concentration

温度和浓度联合影响下冰层融化的研究

• 批准号: 08650234
• 负责人: SUGAWARA Masahiro
• 金额: $ 1.47万
• 依托单位: AKITA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08650234/
• 关键词: Ice; Melting; Aqueous solution; Concentration diffusion; Double diffusive convection

Experimental and numerical investigations are carried out of the melting of a vertical ice plate into a calcium chloride aqueous solution inside a square cavity. The ice plate immersed into the aqueous solution melts spontaneously associated with temperature depression in the ice even when there is no temperature difference between the ice and the aqueous solution just beginning of the melting, which is not possible to predict through the classical Stefan problem controlled with a thermal diffusion. A numerical method with a new concept of a mass diffusion controlled melting predicts quantitatively an abrupt depression in the temperature of the ice, a transient melting mass, and a double diffusive convection in the liquid, which are validated through both experiments of the melting and flow visualizations. Moreover, it is also found that the present numerical prediction will require to set a very smaller mesh size less than about 0.1mm due to the very thin concentration boundary layr closest to the melting front.

对方形空腔内垂直冰板融化成氯化钙水溶液的过程进行了实验和数值研究。浸入水溶液中的冰板与冰中的温度降低自发地融化，即使在冰和刚刚开始融化的水溶液之间没有温度差，这是不可能通过用热扩散控制的经典Stefan问题来预测的。一个新的概念的质量扩散控制的融化的数值方法定量预测的冰的温度，瞬时融化的质量，并在液体中的双扩散对流，这是通过实验验证的融化和流动可视化的突然凹陷。此外，还发现，由于最靠近熔化前沿的浓度边界层非常薄，因此本数值预报将需要设置小于约0.1mm的非常小的网格尺寸。

项目成果

菅原 征洋、藤田 忠: "氷層の温度・濃度複合融解(第2報,対流の可視化観察による数値予測の進展)" 日本機会学会論文集. 63巻612号. 2784-2792 (1997)

Yukihiro Sukawara，Tadashi Fujita：“温度和冰层浓度的综合融化（第二次报告，基于对流视觉观察的数值预测进展）”日本机械工程师学会学报，第 63 卷，第 612 期。2784 -2792 (1997)

菅原征洋, 藤田忠: "氷層の温度・濃度複合融解(第2報,対流の可視化観察による数値予測の進展)" 日本機械学会論文集. 63巻・612号. 2784-2792 (1997)

Masahiro Sukawara、Tadashi Fujita：“温度和冰层浓度的综合融化（第二次报告，基于对流视觉观测的数值预测进展）”日本机械工程师学会学报，第 63 卷，第 612 期。2784 -2792 (1997)

Sugawara, Masahiro: "Melting of an Ice Layr with Double Effect of Temperature and Concentration (2^<nd>, Report, Development of Numerical Prediction with Flow Visualization)" Transaction of the JSME. Vol.63, No.612. 2784-2792 (1997)

Sukawara, Masahiro：“温度和浓度双重效应的冰层融化（第 2^<nd>，报告，流可视化数值预测的发展）”JSME 交易。