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

Beom Seok Kim, Geehong Choi, Sangwoo Shin, Thomas Gemming, Hyung Hee Cho

Research output: Contribution to journalArticle

12 Citations (Scopus)

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.

Original languageEnglish
Article number34348
JournalScientific reports
Volume6
DOIs
Publication statusPublished - 2016 Oct 6

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All Science Journal Classification (ASJC) codes

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