Effect of Maximum Density of Water on Freezing of a Water-Saturated Horizontal Porous Layer
Effect of Maximum Density of Water on Freezing of a Water-Saturated Horizontal Porous Layer
复制标题
最大水密度对水饱和水平多孔层冻结的影响
DOI：
10.1115/1.3250446
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发表时间：
1988
影响因子：
--
通讯作者：
N. Seki
中科院分区：
文献类型：
--
作者：
M. Sugawara;H. Inaba;N. Seki
这项实验通过使用多孔珠层来模拟土层中的水冻结。这一层是从上方冷却的。珠子由1毫米、5毫米和11毫米直径的玻璃和11毫米直径的钢制成。当未冻结层的主要换热方式为导热时，冻结速率不受微珠直径的影响。然而，在自然对流中，冻结速度受4℃时水的最大密度的影响很大。一个不考虑最大密度效应的近似数值分析很好地预测了0C<；T{sub2}<；4C和26C<；T{sub2}(T{sub2}=下盘温度)范围内的冻结速率。
This experiment simulates the freezing of water in a layer of earth by the use of a porous bead layer. The layer is cooled from above. The beads are 1, 5, and 11-mm-dia glass and 11-mm-dia steel. When the predominant heat transfer mode in an unfrozen layer is conduction, the freezing rate is not affected by the bead diameter. However, in natural convection the freezing rate is greatly affected by the maximum density of water at 4C. An approximate numerical analysis which does not treat the maximum density effects predicts well the freezing rate in the range of 0C < T{sub 2} < 4C and 26C < T{sub 2} (T{sub 2} = the lower plate temperature).