Pore-scale and volume-averaged numerical simulations of melting phase change heat transfer in finned metal foam

金属泡沫 材料科学 传热 热力学 体积热力学 机械 相变材料 热导率 有限体积法 热传导 热的 复合材料 多孔性 物理
作者
Shangsheng Feng,Meng Shi,Yifei Li,Tian Jian Lu
出处
期刊:International Journal of Heat and Mass Transfer [Elsevier BV]
卷期号:90: 838-847 被引量:145
标识
DOI:10.1016/j.ijheatmasstransfer.2015.06.088
摘要

The melting process of phase change material (PCM) infiltrated in a finned metal foam was numerically investigated using two approaches: (a) pore-scale and (b) volume-averaged numerical simulations. The pore-scale simulation modeled the intricate geometry of the open-cell metal foam using sphere-centered tetrakaidecahedron and coupled the heat transfer in foam/fin solids with that in the PCM. The volume-averaged simulation used the Darcy–Brinkman–Forchheimer model to account for the motion of melt PCM as well as the one-temperature model based on local thermal equilibrium assumption. The volume-averaged simulation results were compared with the pore-scale simulation results which were used as the benchmark. Reasonable agreement between prediction results of the two approaches was observed. When using the volume-averaged method, the one-temperature model may be applicable without needing the more complicated two-temperature model. The thermal performance of the finned metal foam was compared with conventional plate-fin and metal foam structures, demonstrating its superiority as thermal conductivity enhancer of PCM.
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