| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Lattice Boltzmann simulation on thermal performance of composite phase change material based on Voronoi models |
| Meng-Yue Guo(郭孟月)1, Qun Han(韩群)1, Xiang-Dong Liu(刘向东)1,2,†, and Bo Zhou(周博)3 |
1 Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China;
2 College of Electrical, Energy, and Power Engineering, Yangzhou University, Yangzhou 225127, China;
3 Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application, School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China |
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Abstract Phase change materials (PCMs) are important for sustaining energy development. For the thermal performance enhancement, the composite PCM with metal foam reconstructed by the Voronoi method is investigated in this work. The lattice Boltzmann method (LBM) is used to analyze the melting process on a pore scale. The melting interface evolution and temperature contour of the composite PCM are explored and compared with those of pure PCM. Moreover, structure parameters including the pore density, porosity and irregularity are investigated comprehensively, indicating that the additive of metal foam strengthens the melting performance of PCM obviously. Compared with pure PCM, the composite PCM has quick rates of the melting front evolution and heat transfer. The heat conduction plays a great role in the whole melting process since the convection is weakened for the composite PCM. To improve the melting efficiency, a larger pore density and smaller irregularity are recommended in general. More significantly, a suitable porosity is determined based on the requirement for the balance between the melting rate and heat storage capacity in practical engineering.
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Received: 25 January 2021
Revised: 05 March 2021
Accepted manuscript online: 24 May 2021
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PACS:
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44.30.+v
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(Heat flow in porous media)
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44.25.+f
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(Natural convection)
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44.05.+e
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(Analytical and numerical techniques)
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44.10.+i
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(Heat conduction)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 51876184, 51725602, and 51806147) and the Natural Science Foundation of Jiangsu Province, China (Grant No. BK20180102). |
Corresponding Authors:
Xiang-Dong Liu
E-mail: liuxd@yzu.edu.cn
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Cite this article:
Meng-Yue Guo(郭孟月), Qun Han(韩群), Xiang-Dong Liu(刘向东), and Bo Zhou(周博) Lattice Boltzmann simulation on thermal performance of composite phase change material based on Voronoi models 2021 Chin. Phys. B 30 104401
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