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<p>This numerical study explores three new designs of microchannel heat sinks (MCHS) to address the existing thermal management issues in sophisticated electronic systems: plus, hexagram, and arrow shaped. Specifically, the study assesses the improvement in thermal–hydraulic performance caused by the use of sophisticated carbon-based nanofluids such as MXene, MWCNT, and SWCNT, as well as cylindrical-shaped and platelet-shaped boehmite nanoparticles at 0.01 mass% and 1 mass%. A thoroughly built and validated computational fluid dynamics (CFD) model was able to solve governing equations under well-defined boundary conditions. The mesh selection and Reynolds number selections (400, 800, 1200, and 1600) were explained in detail. Figure of merit (FoM), bottom wall temperature, pressure drop, and heat transfer coefficient are among the performance parameters that are assessed. MWCNT had better thermal performance than any other nanofluid that was examined. The plus-shaped microchannel specifically showed a 16.76% greater heat transfer coefficient and a 0.64% lower bottom wall temperature at Reynolds number 1600 and 1 mass% concentration than the previously ideal triangular shape. Additionally, the pressure drop was decreased by 6.26% in the hexagram-shaped channel as opposed to the ideal circular arrangement. This study offers fresh perspectives on how sophisticated nanofluids and geometric innovation can greatly improve thermal management, pointing to obvious avenues for further investigation into even more intricate microchannel geometries.</p>

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Numerical investigation of microchannel heat sinks thermal performance enhancement employing innovative channel cross section with CNT and MXene nanofluids

  • 期刊论文

  • 发表日期：

    2025年6月19日

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  • Md. Safwoan Bin Manjur,
  • Fariha Liakat,
  • Nafiul Islam,
  • Mohammad Rejaul Haque,
  • Md Araf Hossan

摘要

This numerical study explores three new designs of microchannel heat sinks (MCHS) to address the existing thermal management issues in sophisticated electronic systems: plus, hexagram, and arrow shaped. Specifically, the study assesses the improvement in thermal–hydraulic performance caused by the use of sophisticated carbon-based nanofluids such as MXene, MWCNT, and SWCNT, as well as cylindrical-shaped and platelet-shaped boehmite nanoparticles at 0.01 mass% and 1 mass%. A thoroughly built and validated computational fluid dynamics (CFD) model was able to solve governing equations under well-defined boundary conditions. The mesh selection and Reynolds number selections (400, 800, 1200, and 1600) were explained in detail. Figure of merit (FoM), bottom wall temperature, pressure drop, and heat transfer coefficient are among the performance parameters that are assessed. MWCNT had better thermal performance than any other nanofluid that was examined. The plus-shaped microchannel specifically showed a 16.76% greater heat transfer coefficient and a 0.64% lower bottom wall temperature at Reynolds number 1600 and 1 mass% concentration than the previously ideal triangular shape. Additionally, the pressure drop was decreased by 6.26% in the hexagram-shaped channel as opposed to the ideal circular arrangement. This study offers fresh perspectives on how sophisticated nanofluids and geometric innovation can greatly improve thermal management, pointing to obvious avenues for further investigation into even more intricate microchannel geometries.