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- W3214055215 endingPage "122189" @default.
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- W3214055215 abstract "Boiling heat transfer is dictated by interfacial phenomena at the three-phase contact line where vapor bubbles form on the surface. Structured surfaces have shown significant enhancement in critical heat flux (CHF) during pool boiling by tailoring interfacial phenomena. This CHF enhancement has been primarily explained by two structural effects: roughness, which extends the contact line length at the bubble base, and wickability, the ability to imbibe liquid through surface structures by capillary pumping. In this work, we show that CHF enhancement on structured surfaces cannot be described by roughness or wickability alone. This result was confirmed using systematically designed micropillar surfaces with controlled roughness and wickability. Further, we performed a scaling analysis and derived a unified descriptor, which represents the combined effects of thin film density and volumetric wicking rate. This unified descriptor shows a reasonable correlation with CHF values with our experiments and literature data. This work provides important insights in understanding the role of surface structures on CHF enhancement, thereby providing guidelines for the systematic design of surface structures for enhanced pool boiling heat transfer." @default.
- W3214055215 created "2021-11-22" @default.
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- W3214055215 date "2022-02-01" @default.
- W3214055215 modified "2023-10-18" @default.
- W3214055215 title "Unified descriptor for enhanced critical heat flux during pool boiling of hemi-wicking surfaces" @default.
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- W3214055215 doi "https://doi.org/10.1016/j.ijheatmasstransfer.2021.122189" @default.
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