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Enhanced Boiling Heat Transfer with Composite Nano-particle Coating

Strategic Insights

— 1 min read

Researchers at the National Institute of Technology Arunachal Pradesh have developed a new composite nano-particle coating that significantly improves boiling heat transfer on horizontal copper surfaces. The study, published in the journal Heat and Mass Transfer, describes the creation of the nano-structured surfaces using a two-step chemical method. The researchers found that the composite nano-particle coating, which consists of Cu-Al2O3 particles, demonstrates improved performance compared to bare copper surfaces.

The study's results indicate that the composite nano-particle coating exhibits a 53% increase in Critical Heat Flux (CHF) and a 95% increase in Boiling Heat Transfer Coefficient (BHTC) compared to bare copper. Additionally, the bubble characteristics at the time of boiling were analyzed using a high-speed camera, revealing increased nucleation site density, bubble departure diameter, and bubble departure frequency. These findings contribute to the improved boiling heat transfer performance of the composite nano-particle coating.

Key Takeaways:

  • The composite nano-particle coating exhibits a 53% increase in Critical Heat Flux (CHF) and a 95% increase in Boiling Heat Transfer Coefficient (BHTC) compared to bare copper.
  • The study presents a new two-step chemical method for creating nano-structured surfaces, which can be used to improve boiling heat transfer performance.
  • The researchers analyzed the bubble characteristics at the time of boiling using a high-speed camera and found increased nucleation site density, bubble departure diameter, and bubble departure frequency.
  • The improved boiling heat transfer performance of the composite nano-particle coating can be attributed to its unique structure and properties.
  • Researchers Dipak Sen, Sanjib Kalita, Pulak Sen, Sudev Das, and Biresh Shil contributed to this study.

Statistics:

  • 53% increase in Critical Heat Flux (CHF) compared to bare copper
  • 95% increase in Boiling Heat Transfer Coefficient (BHTC) compared to bare copper
  • 61(10) is the issue number of the journal Heat and Mass Transfer.
  • The study was published in October 2025 in Heat and Mass Transfer.

Sources:

  • [1] NewsRx. Findings on Nanoparticles Reported by Investigators at National Institute of Technology (Experimental Investigation of Bubble Dynamics and Pool Boiling Heat Transfer of Composite Nano-particle Coating On Horizontal Copper Surfaces Using Hybrid ...). Nanotechnology Weekly. October 13, 2025; p 464.
  • [2] Experimental Investigation of Bubble Dynamics and Pool Boiling Heat Transfer of Composite Nano-particle Coating On Horizontal Copper Surfaces Using Hybrid Method. Heat and Mass Transfer, 2025;61(10).

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