期刊
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
卷 90, 期 -, 页码 838-847出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijheatmasstransfer.2015.06.088
关键词
Metal foam; Phase change material (PCM); Pore-scale numerical simulation; Local thermal equilibrium
资金
- National Natural Science Foundation of China [51206128]
- National Basic Research Program of China [2011CB610305]
- National 111 Project of China [B06024]
- Postdoctoral Science Foundation of China [2012M521766]
- Shaanxi Province Science Foundation
- Fundamental Research Funds for the Central Universities of China
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. (C) 2015 Elsevier Ltd. All rights reserved.
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