多孔質材料による溶融促進法

概要

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The problem of melting a phase-change material (PCM) using a heating plate made of porous medium is investigated theoretically. Fluid flowing through a plate made of porous medium is governed by Darcy's law. As PCM and the heating plate approach each other, under typical conditions, part of the melting liquid will be squeezed out, and the remaining part will flow out through the porous medium. However, under a critical condition, it is found that all the melting liquid flows out through the porous medium, and PCM is steadily melted by contact with the porous heating plate, which in turn is pushed by PCM under a given finite force. The melting velocity under this critical condition is obtained analytically as a function of four dimensionless parameters. It is possible for the melting velocity in the critical condition to be higher than that for the case of the nonporous heating plate. The critical condition above which the melting velocity is enhanced by using the porous heating plate is shown in the diagram composed of four dimensionless parameters : porosity, Stefan number, thermal conductivity of porous plate material and particle diameter of sphere model for the porous medium.
社団法人日本機械学会の論文
1995-10-25