Nano-inspired fluidic interactivity for boiling heat transfer: Impact and criteria

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Date
2016
Volume
6
Issue
Journal
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Publisher
London : Nature Publishing Group
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Abstract

The enhancement of boiling heat transfer, the most powerful energy-transferring technology, will lead to milestones in the development of high-efficiency, next-generation energy systems. Perceiving nano-inspired interface functionalities from their rough morphologies, we demonstrate interface-induced liquid refreshing is essential to improve heat transfer by intrinsically avoiding Leidenfrost phenomenon. High liquid accessibility of hemi-wicking and catalytic nucleation, triggered by the morphological and hydrodynamic peculiarities of nano-inspired interfaces, contribute to the critical heat flux (CHF) and the heat transfer coefficient (HTC). Our experiments show CHF is a function of universal hydrodynamic characteristics involving interfacial liquid accessibility and HTC is improved with a higher probability of smaller nuclei with less superheat. Considering the interface-induced and bulk liquid accessibility at boiling, we discuss functionalizing the interactivity between an interface and a counteracting fluid seeking to create a novel interface, a so-called smart interface, for a breakthrough in boiling and its pragmatic application in energy systems.

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Keywords
Fluid dynamics, Mechanical engineering
Citation
Kim, B. S., Choi, G., Shin, S., Gemming, T., & Cho, H. H. (2016). Nano-inspired fluidic interactivity for boiling heat transfer: Impact and criteria. 6. https://doi.org//10.1038/srep34348
License
CC BY 4.0 Unported