Numerical analysis of fluid flow and heat transfer during melting inside a cylindrical container for thermal energy storage system
Numerical analysis of fluid flow and heat transfer during melting inside a cylindrical container for thermal energy storage system
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DOI：
10.1063/1.4984427
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发表时间：
2017-06
期刊：
影响因子：
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通讯作者：
Selvan Bellan;Cho Hyun Cheok;N. Gokon;K. Matsubara;T. Kodama
中科院分区：
文献类型：
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作者：
Selvan Bellan;Cho Hyun Cheok;N. Gokon;K. Matsubara;T. Kodama
本文对高温（>1000K）相变材料（PCM）在圆柱形容器内的无约束熔化进行了数值分析。采用氯化钠作为相变材料，碳化硅作为囊壳。采用控制体离散方法求解质量、动量和能量守恒方程。采用孔隙度法跟踪了相变材料熔化过程中的固液界面。为了研究胶囊半径和Stefan数对传热速率的影响，进行了瞬态数值模拟。模拟结果表明，逆时针浮力驱动的对流在固体相变材料的顶部部分的熔化速度比底部的快得多。
This paper presents a numerical analysis of unconstrained melting of high temperature(>1000K) phase change material (PCM) inside a cylindrical container. Sodium chloride and Silicon carbide have been used as phase change material and shell of the capsule respectively. The control volume discretization approach has been used to solve the conservation equations of mass, momentum and energy. The enthalpy-porosity method has been used to track the solid-liquid interface of the PCM during melting process. Transient numerical simulations have been performed in order to study the influence of radius of the capsule and the Stefan number on the heat transfer rate. The simulation results show that the counter-clockwise Buoyancy driven convection over the top part of the solid PCM enhances the melting rate quite faster than the bottom part.