Early Onset of Nucleate Boiling on Gas-covered Biphilic Surfaces

Abstract For phase-change cooling schemes for electronics, quick activation of nucleate boiling helps safeguard the electronics components from thermal shocks associated with undesired surface superheating at boiling incipience, which is of great importance to the long-term system stability and reli...

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Autores principales:	Biao Shen, Masayuki Yamada, Sumitomo Hidaka, Jiewei Liu, Junichiro Shiomi, Gustav Amberg, Minh Do-Quang, Masamichi Kohno, Koji Takahashi, Yasuyuki Takata
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/96bf137488714acf98e1de4314c6c2ed
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spelling	oai:doaj.org-article:96bf137488714acf98e1de4314c6c2ed2021-12-02T15:05:33ZEarly Onset of Nucleate Boiling on Gas-covered Biphilic Surfaces10.1038/s41598-017-02163-82045-2322https://doaj.org/article/96bf137488714acf98e1de4314c6c2ed2017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-02163-8https://doaj.org/toc/2045-2322Abstract For phase-change cooling schemes for electronics, quick activation of nucleate boiling helps safeguard the electronics components from thermal shocks associated with undesired surface superheating at boiling incipience, which is of great importance to the long-term system stability and reliability. Previous experimental studies show that bubble nucleation can occur surprisingly early on mixed-wettability surfaces. In this paper, we report unambiguous evidence that such unusual bubble generation at extremely low temperatures—even below the boiling point—is induced by a significant presence of incondensable gas retained by the hydrophobic surface, which exhibits exceptional stability even surviving extensive boiling deaeration. By means of high-speed imaging, it is revealed that the consequently gassy boiling leads to unique bubble behaviour that stands in sharp contrast with that of pure vapour bubbles. Such findings agree qualitatively well with numerical simulations based on a diffuse-interface method. Moreover, the simulations further demonstrate strong thermocapillary flows accompanying growing bubbles with considerable gas contents, which is associated with heat transfer enhancement on the biphilic surface in the low-superheat region.Biao ShenMasayuki YamadaSumitomo HidakaJiewei LiuJunichiro ShiomiGustav AmbergMinh Do-QuangMasamichi KohnoKoji TakahashiYasuyuki TakataNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-15 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Biao Shen Masayuki Yamada Sumitomo Hidaka Jiewei Liu Junichiro Shiomi Gustav Amberg Minh Do-Quang Masamichi Kohno Koji Takahashi Yasuyuki Takata Early Onset of Nucleate Boiling on Gas-covered Biphilic Surfaces
description	Abstract For phase-change cooling schemes for electronics, quick activation of nucleate boiling helps safeguard the electronics components from thermal shocks associated with undesired surface superheating at boiling incipience, which is of great importance to the long-term system stability and reliability. Previous experimental studies show that bubble nucleation can occur surprisingly early on mixed-wettability surfaces. In this paper, we report unambiguous evidence that such unusual bubble generation at extremely low temperatures—even below the boiling point—is induced by a significant presence of incondensable gas retained by the hydrophobic surface, which exhibits exceptional stability even surviving extensive boiling deaeration. By means of high-speed imaging, it is revealed that the consequently gassy boiling leads to unique bubble behaviour that stands in sharp contrast with that of pure vapour bubbles. Such findings agree qualitatively well with numerical simulations based on a diffuse-interface method. Moreover, the simulations further demonstrate strong thermocapillary flows accompanying growing bubbles with considerable gas contents, which is associated with heat transfer enhancement on the biphilic surface in the low-superheat region.
format	article
author	Biao Shen Masayuki Yamada Sumitomo Hidaka Jiewei Liu Junichiro Shiomi Gustav Amberg Minh Do-Quang Masamichi Kohno Koji Takahashi Yasuyuki Takata
author_facet	Biao Shen Masayuki Yamada Sumitomo Hidaka Jiewei Liu Junichiro Shiomi Gustav Amberg Minh Do-Quang Masamichi Kohno Koji Takahashi Yasuyuki Takata
author_sort	Biao Shen
title	Early Onset of Nucleate Boiling on Gas-covered Biphilic Surfaces
title_short	Early Onset of Nucleate Boiling on Gas-covered Biphilic Surfaces
title_full	Early Onset of Nucleate Boiling on Gas-covered Biphilic Surfaces
title_fullStr	Early Onset of Nucleate Boiling on Gas-covered Biphilic Surfaces
title_full_unstemmed	Early Onset of Nucleate Boiling on Gas-covered Biphilic Surfaces
title_sort	early onset of nucleate boiling on gas-covered biphilic surfaces
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/96bf137488714acf98e1de4314c6c2ed
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Early Onset of Nucleate Boiling on Gas-covered Biphilic Surfaces

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