Numerical evaluation of MHD SWCNT-water nanoliquid performance in cooling an electronic heat sink featuring twisted hexagonal fins considering thermal emission impact: Comparison between various fins shapes

Nowadays, the enhancement of heat sink efficiency using nanofluids is an important area that academics are focusing on. Until now, there is no study has been carried out to examine the performance of hexagonal twisted fins on heat sink efficiency using nanofluids in light of its thermal radiation ef...

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Bibliographic Details
Published in:Sustainable energy technologies and assessments 2022-10, Vol.53, p.102350, Article 102350
Main Authors: Massoudi, Mohamed Dhia, Hamida, Mohamed Bechir Ben, Almeshaal, Mohammed A., Hajlaoui, Khalil
Format: Article
Language:English
Subjects:
Comsol Multiphysics
Free convection
Heat sink
MHD
Nanofluid
Thermal radiation
Twisted hexagonal fins
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Summary:Nowadays, the enhancement of heat sink efficiency using nanofluids is an important area that academics are focusing on. Until now, there is no study has been carried out to examine the performance of hexagonal twisted fins on heat sink efficiency using nanofluids in light of its thermal radiation effect. The aim of this research is to investigate numerically the efficiency of employing SWCNT-water nanofluid into an inclined heat dissipator box featured with twisted hexagonal fins beneath the impact of Lorentz forces, take into consideration the nanoliquid radiation effect. The study is constructed using the Comsol Multiphysics tool. The Rayleigh and Hartmann variables, the radiative element, the aspect ratio of twisted hexagonal fins and the distance between fins are all analyzed as variables that affect the heat transfer efficiency. The impact of different box tilt angles is also discussed. The data reveal that expanding the amount of Rayleigh parameter enhances the heat exchange rate, whilst, the Lorentz forces diminishes it. In addition, the heat sink efficiency rises by 45.59 % while expanding the radiative element. Expanding the hexagonal fins aspect ratio from 0.05 to 0.2 enhances the convective flow by 32.87 %, nevertheless, growing the fins inter distance from 0.1 to 0.5 diminishes it by 2 %. The square then the hexagonal shapes provide the best heat sink efficiency by 4.21 % and 0.38 % respectively compared to classical circle fins.
ISSN:2213-1388
DOI:10.1016/j.seta.2022.102350