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<p>Heat sinks designed for high-performance refrigerants offer considerable benefits in military and commercial aircraft avionics, as well as in aerospace systems. Their compact design enables efficient heat dissipation while minimizing the amount of material and refrigerant required. This experimental study examined the thermal-fluid performance of compact segmented microchannel heat sinks made from polydimethylsiloxane (PDMS). By incorporating two-dimensional hexagonal boron nitride (hBN) nanoparticles into the PDMS matrix, the resulting nanocomposite exhibited improved thermal properties. Deionized water was used as the working fluid in the experiments. The findings showed that the PDMS/hBN nanocomposite reduced the surface temperature by 3% compared to pure PDMS, confirming its enhanced heat dissipation capability. Additionally, pressure drop measurements remained consistent between the pure PDMS and PDMS/hBN heat sinks across various flow rates, indicating that including hBN nanoparticles did not significantly affect wall friction. To validate the experimental data, numerical simulations were performed using ANSYS FLUENT®, replicating the same experimental conditions. The comparison between numerical and experimental results demonstrated the model’s accuracy for both surface temperature and pressure drop. The outcomes of this research provide valuable insights for the cooling industry, particularly in thermal management solutions for electronic components and equipment. Furthermore, this study advances the understanding of thermally enhanced nanocomposites as promising materials for compact and highly efficient heat sinks.</p>

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Enhancement of thermal performance of polymer-based micro-pin finned heat sinks by incorporating 2-D materials

  • 期刊论文

  • 发表日期：

    2025年9月23日

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  • Raissa G. Corrêa,
  • Elaine M. Cardoso,
  • Reinaldo R. Souza,
  • José Pereira,
  • Glauco Nóbrega,
  • Ana Moita

摘要

Heat sinks designed for high-performance refrigerants offer considerable benefits in military and commercial aircraft avionics, as well as in aerospace systems. Their compact design enables efficient heat dissipation while minimizing the amount of material and refrigerant required. This experimental study examined the thermal-fluid performance of compact segmented microchannel heat sinks made from polydimethylsiloxane (PDMS). By incorporating two-dimensional hexagonal boron nitride (hBN) nanoparticles into the PDMS matrix, the resulting nanocomposite exhibited improved thermal properties. Deionized water was used as the working fluid in the experiments. The findings showed that the PDMS/hBN nanocomposite reduced the surface temperature by 3% compared to pure PDMS, confirming its enhanced heat dissipation capability. Additionally, pressure drop measurements remained consistent between the pure PDMS and PDMS/hBN heat sinks across various flow rates, indicating that including hBN nanoparticles did not significantly affect wall friction. To validate the experimental data, numerical simulations were performed using ANSYS FLUENT®, replicating the same experimental conditions. The comparison between numerical and experimental results demonstrated the model’s accuracy for both surface temperature and pressure drop. The outcomes of this research provide valuable insights for the cooling industry, particularly in thermal management solutions for electronic components and equipment. Furthermore, this study advances the understanding of thermally enhanced nanocomposites as promising materials for compact and highly efficient heat sinks.