A Study of the Melting Process in Ice-air Composite Materials : In the Case Where a Temperature Gradient Exists in Porous Materials

概要

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The melting process of ice-air composite materials was investigated for the case where heat was supplied from the bottom and lost from the top of the body. The process was divided into four periods, and a one-dimensional melting model was formulated accounting for water permeation and its refreezing in porous materials. The model equations were solved numerically, and the calculated results were found to be in good agreement with the experimental results obtained for the melting of compacted snow. From comparison of melting time and melting efficiency between the present predictions and the classical Stefan solutions, it was found that water permeation and its refreezing in porous materials resulted in a longer melting time and a lower melting efficiency due to the increase in a heat loss from the top of the layer.
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