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<p>This research examines the thermal behavior of Al₂O₃-based nanofluids in multilayer microchannel heat sink (MCHS) using both simulation and experimental approaches. The examinations were carried out considering three distinct nanofluid concentrations viz 0.5, 1.0, and 2.0% volume and mass flux values from 0.01 to 0.05&#xa0;kg/s. Observations demonstrated that an increase in concentration enhances heat transfer performance, with Nusselt numbers ranging 112.0 at 2.0% concentration results, considering that the influence of mass flow rate on the heat dissipation coefficient rose sharply and heat transfer coefficient reached the maximum of 270.8 W/m<sup>2</sup>·K. As a consequence of it, the pressure drop that accompanied enhanced performance increased to 600&#xa0;Pa in similar circumstances. This work optimizes Al₂O₃ nanofluids in multilayer MCHS, boosting heat transfer to 270.8 W/m<sup>2</sup>·K while controlling pressure drop. The optimal 1.5% concentration at 0.04&#xa0;kg/s offers efficient, scalable cooling solutions for electronics, automotive, and industrial applications. This research also utilized a multi-objective optimization strategy that determined proper operating conditions that would result in both thermal efficiency and pumping power. From these findings, it is evident that Al₂O₃ nanofluids can be used in enhanced cooling applications, and researchers and engineers in the industrial and manufacturing sectors can use them in enhancing their cooling systems designs and parameters.</p>

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Experimental and numerical analysis of pressure drop optimization and comparative evaluation of multilayer microchannel nanofluid coolants for enhanced thermal performance in compact heat sinks

  • 期刊论文

  • 发表日期：

    2025年9月17日

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  • G. Ramya,
  • Dhivakar Poosapadi,
  • K. Varatharajan,
  • A. Rami Reddy,
  • G. V. Krishna Pradeep,
  • N. Alangudi Balaji,
  • Vivek Chidambaram,
  • Jim Mathew Philip,
  • A. Rajaram

摘要

This research examines the thermal behavior of Al₂O₃-based nanofluids in multilayer microchannel heat sink (MCHS) using both simulation and experimental approaches. The examinations were carried out considering three distinct nanofluid concentrations viz 0.5, 1.0, and 2.0% volume and mass flux values from 0.01 to 0.05 kg/s. Observations demonstrated that an increase in concentration enhances heat transfer performance, with Nusselt numbers ranging 112.0 at 2.0% concentration results, considering that the influence of mass flow rate on the heat dissipation coefficient rose sharply and heat transfer coefficient reached the maximum of 270.8 W/m2·K. As a consequence of it, the pressure drop that accompanied enhanced performance increased to 600 Pa in similar circumstances. This work optimizes Al₂O₃ nanofluids in multilayer MCHS, boosting heat transfer to 270.8 W/m2·K while controlling pressure drop. The optimal 1.5% concentration at 0.04 kg/s offers efficient, scalable cooling solutions for electronics, automotive, and industrial applications. This research also utilized a multi-objective optimization strategy that determined proper operating conditions that would result in both thermal efficiency and pumping power. From these findings, it is evident that Al₂O₃ nanofluids can be used in enhanced cooling applications, and researchers and engineers in the industrial and manufacturing sectors can use them in enhancing their cooling systems designs and parameters.