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- W3120821077 abstract "Boiling heat transfer intensification is of significant relevance to energy conversion and various cooling processes. This study aimed to enhance the saturated pool boiling of FC-72 (a dielectric liquid) by surface modifications and explore mechanisms of the enhancement. Specifically, circular and square micro pin fins were fabricated on silicon surfaces by dry etching and then copper nanoparticles were deposited on the micro-pin-fin surfaces by electrostatic deposition. Experimental results indicated that compared with a smooth surface, the micro pin fins increased the heat transfer coefficient and the critical heat flux by more than 200 and 65–83%, respectively, which were further enhanced by the nanoparticles up to 24% and more than 20%, respectively. Correspondingly, the enhancement mechanism was carefully explored by high-speed bubble visualizations, surface wickability measurements, and model analysis. It was quantitatively found that small bubble departure diameters with high bubble departure frequencies promoted high heat transfer coefficients. The wickability, which characterizes the ability of a liquid to rewet a surface, played an important role in determining the critical heat flux, but further analyses indicated that evaporation beneath bubbles was also essential and competition between the wicking and the evaporation finally triggered the critical heat flux." @default.
- W3120821077 created "2021-01-18" @default.
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- W3120821077 date "2021-01-08" @default.
- W3120821077 modified "2023-10-16" @default.
- W3120821077 title "Nanoparticle-Assisted Pool Boiling Heat Transfer on Micro-Pin-Fin Surfaces" @default.
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- W3120821077 doi "https://doi.org/10.1021/acs.langmuir.0c02860" @default.
- W3120821077 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7880573" @default.
- W3120821077 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33417766" @default.
- W3120821077 hasPublicationYear "2021" @default.
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