https://doi.org/10.1140/epjp/s13360-025-06187-2
Regular Article
Effect of temperature and electrode patches on the flow structure and heat transfer of dielectric liquid
1
Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong SAR, People’s Republic of China
2
School of Automotive Studies, Tongji University, 201804, Shanghai, People’s Republic of China
3
Shanghai Automotive Wind Tunnel Center, Tongji University, 201804, Shanghai, People’s Republic of China
4
Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, People’s Republic of China
5
School of Engineering, Damghan University, P.O. Box: 3671641167, Damghan, Iran
6
Beijing Aeronautical Science & Technology Research Institute, 102211, Beijing, People’s Republic of China
Received:
16
December
2024
Accepted:
27
February
2025
Published online:
24
March
2025
Electro-thermo-convection (ETC) plays a critical role in heat transfer enhancement, particularly in dielectric fluids subjected to external electric fields. However, the impact of temperature and electrode patch arrangements on the flow structure and heat transfer characteristics of ETC remains underexplored. This study systematically investigates the influence of these factors within a square cavity using the lattice Boltzmann method (LBM). The effects of Rayleigh number (5000 ≤ Ra ≤ 50,000), electric Rayleigh number (100 ≤ T ≤ 200), and patch aspect ratio (0.05 ≤ AR ≤ 0.95) are analyzed. The results show that varying AR significantly alters the flow structure, charge density, and electric potential distribution. Notably, for Ra = 5000 and 10,000, increasing T enhances heat transfer, with the highest average Nusselt number (Nuavg) observed at AR = 0.05 and T = 200, leading to a 36% and 30% increase, respectively. However, at Ra = 50,000, the effect of T on Nuavg becomes less pronounced. These findings provide new insights into optimizing ETC for advanced thermal management applications.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2025
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
