Favourably regulating two-phase flow regime of flow boiling HFE-7100 in microchannels using silicon nanowires

Abstract High performance miniaturized electronic devices require enhanced, compact and reliable thermal management system. As an efficient compact space cooling technique, flow boiling in microchannels has recently gained wide acceptance. However, weak buoyancy effects and microgravity in avionics...

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Autores principales:	Tamanna Alam, Wenming Li, Wei Chang, Fanghao Yang, Jamil Khan, Chen Li
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/9aa9d86e2fc940f48daa195bc1be0dc6
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spelling	oai:doaj.org-article:9aa9d86e2fc940f48daa195bc1be0dc62021-12-02T15:00:19ZFavourably regulating two-phase flow regime of flow boiling HFE-7100 in microchannels using silicon nanowires10.1038/s41598-021-89466-z2045-2322https://doaj.org/article/9aa9d86e2fc940f48daa195bc1be0dc62021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-89466-zhttps://doaj.org/toc/2045-2322Abstract High performance miniaturized electronic devices require enhanced, compact and reliable thermal management system. As an efficient compact space cooling technique, flow boiling in microchannels has recently gained wide acceptance. However, weak buoyancy effects and microgravity in avionics and numerous space systems operations hinder the performance of flow boiling microchannel thermal management system due to poor bubble departure capacity and unfavorable development of flow regimes. Here we report the flow boiling silicon nanowires (SiNWs) microchannels which can favorably regulate two-phase flow regimes by enhancing explosive boiling, minimizing bubble departure diameter, and smoothing flow regime transition. Extensive experimental investigations along with high speed visualizations are performed. The experiments are performed with the dielectric fluid HFE-7100 in a forced convection loop for wide range of heat and mass fluxes. High speed flow visualizations have been employed at up to 70 k frames per second (fps) to understand the boiling mechanism in terms of bubble dynamics, flow patterns, and flow regime developments for SiNWs microchannels. These studies show that SiNWs reduce intermittent flow regimes (slug/churn), improve rewetting and maintain thin liquid film at wall. Therefore, flow boiling in SiNW microchannels is promising to thermal management owing to its high heat transfer rate with low pressure drop and negligible microgravity sensitivity.Tamanna AlamWenming LiWei ChangFanghao YangJamil KhanChen LiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-16 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Tamanna Alam Wenming Li Wei Chang Fanghao Yang Jamil Khan Chen Li Favourably regulating two-phase flow regime of flow boiling HFE-7100 in microchannels using silicon nanowires
description	Abstract High performance miniaturized electronic devices require enhanced, compact and reliable thermal management system. As an efficient compact space cooling technique, flow boiling in microchannels has recently gained wide acceptance. However, weak buoyancy effects and microgravity in avionics and numerous space systems operations hinder the performance of flow boiling microchannel thermal management system due to poor bubble departure capacity and unfavorable development of flow regimes. Here we report the flow boiling silicon nanowires (SiNWs) microchannels which can favorably regulate two-phase flow regimes by enhancing explosive boiling, minimizing bubble departure diameter, and smoothing flow regime transition. Extensive experimental investigations along with high speed visualizations are performed. The experiments are performed with the dielectric fluid HFE-7100 in a forced convection loop for wide range of heat and mass fluxes. High speed flow visualizations have been employed at up to 70 k frames per second (fps) to understand the boiling mechanism in terms of bubble dynamics, flow patterns, and flow regime developments for SiNWs microchannels. These studies show that SiNWs reduce intermittent flow regimes (slug/churn), improve rewetting and maintain thin liquid film at wall. Therefore, flow boiling in SiNW microchannels is promising to thermal management owing to its high heat transfer rate with low pressure drop and negligible microgravity sensitivity.
format	article
author	Tamanna Alam Wenming Li Wei Chang Fanghao Yang Jamil Khan Chen Li
author_facet	Tamanna Alam Wenming Li Wei Chang Fanghao Yang Jamil Khan Chen Li
author_sort	Tamanna Alam
title	Favourably regulating two-phase flow regime of flow boiling HFE-7100 in microchannels using silicon nanowires
title_short	Favourably regulating two-phase flow regime of flow boiling HFE-7100 in microchannels using silicon nanowires
title_full	Favourably regulating two-phase flow regime of flow boiling HFE-7100 in microchannels using silicon nanowires
title_fullStr	Favourably regulating two-phase flow regime of flow boiling HFE-7100 in microchannels using silicon nanowires
title_full_unstemmed	Favourably regulating two-phase flow regime of flow boiling HFE-7100 in microchannels using silicon nanowires
title_sort	favourably regulating two-phase flow regime of flow boiling hfe-7100 in microchannels using silicon nanowires
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/9aa9d86e2fc940f48daa195bc1be0dc6
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Favourably regulating two-phase flow regime of flow boiling HFE-7100 in microchannels using silicon nanowires

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