Numerical Analysis on Thermal Performances of Metal Foam Composite Phase Change Materials Under Cavity Effects

PAN Hanting; XU Duo; XU Hongtao; LUO Zhuqing

doi:10.21656/1000-0887.440082

Volume 45 Issue 1

Jan. 2024

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Article Navigation > Applied Mathematics and Mechanics > 2024 > 45(1): 85-96

PAN Hanting, XU Duo, XU Hongtao, LUO Zhuqing. Numerical Analysis on Thermal Performances of Metal Foam Composite Phase Change Materials Under Cavity Effects[J]. Applied Mathematics and Mechanics, 2024, 45(1): 85-96. doi: 10.21656/1000-0887.440082

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Numerical Analysis on Thermal Performances of Metal Foam Composite Phase Change Materials Under Cavity Effects

doi: 10.21656/1000-0887.440082

School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, P.R.China

Received Date: 2023-03-27
Rev Recd Date: 2023-09-14
Publish Date: 2024-01-01

Abstract

Abstract

A randomly distributed cavity model was constructed for 3D metal foam composite phase change materials (PCMs), and the multi-relaxation time lattice Boltzmann method was used to explore the cavity effects with different volume fractions, distribution locations, and thermal conductivity ratios of metal foam to PCM at the cavity scale. The results show that, with the increase of the cavity volume fraction, the heat transfer rate and latent heat storage capacity of composite PCMs would decrease. At a Fourier number of 0.7, compared to the case without cavity, the heat storage decreases respectively by 3.2%, 9.0%, and 13.0% for a cavity volume fraction of 2.4%, 7.6%, and 11.7%, respectively. The significant hindering effect on the melting process of composite PCMs occurs in the case of cavities with a volume fraction of 3% and concentrated near the high-temperature wall. The cavities act as an adiabatic layer, extending the complete melting time of composite PCMs by 6.1%. To weaken the cavity effect, the metal foam skeleton with a thermal conductivity ratio of more than 100 can be selected to improve its leading role in heat transfer.
- phase change,
- metal foam,
- cavity,
- melting,
- lattice Boltzmann method

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References(24)

References

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