Numerical investigation of flow boiling characteristics in cobweb-shaped microchannel heat sink

In recent years, researchers have conducted extensive studies on the improvement of heat transfer performance of microchannels, however, exploiting biomimetic microchannels to enhance the flow boiling heat transfer performance is still relatively rare. In this study, inspired by the cobweb structure...

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Autores principales:	Juncheng Qiu, Jianhong Zhou, Qi Zhao, Hanshi Qin, Xuemei Chen
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Cobweb-shaped microchannel Flow boiling Heat transfer Pressure drop Instability Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/2f2444c9f9ee4bf48abd088271ea8c95
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id	oai:doaj.org-article:2f2444c9f9ee4bf48abd088271ea8c95
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spelling	oai:doaj.org-article:2f2444c9f9ee4bf48abd088271ea8c952021-12-02T05:01:35ZNumerical investigation of flow boiling characteristics in cobweb-shaped microchannel heat sink2214-157X10.1016/j.csite.2021.101677https://doaj.org/article/2f2444c9f9ee4bf48abd088271ea8c952021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2214157X21008406https://doaj.org/toc/2214-157XIn recent years, researchers have conducted extensive studies on the improvement of heat transfer performance of microchannels, however, exploiting biomimetic microchannels to enhance the flow boiling heat transfer performance is still relatively rare. In this study, inspired by the cobweb structures in nature, cobweb-shaped microchannels with horizontal inlet and outlet (CMHS-H) and cobweb-shaped microchannels with inclined inlet and outlet (CMHS-I) are proposed. Flow boiling simulations are carried out with the inlet temperature of 300 K at the bottom heat flux of 75–125 W/cm2 under different mass fluxes by utilizing volume of fluid (VOF) model. The flow boiling characteristics of the CMHS-I and CMHS-H are studied and compared with those of the rectangular microchannel heat sink (RMHS). The results demonstrate that both the CMHS-H and CMHS-I can enhance the heat transfer coefficient and reduce the wall temperature due to the flow disturbance and increased heat transfer area; whereas the CMHS-H is effective to reduce the pressure drop and suppress the flow instability at high mass flux. At high heat flux, the CMHS-H shows the best heat transfer performance and the most stable flow boiling behavior. This study provides a promising approach of using biomimetic microchannels to dissipate high heat flux associated with advanced electronics.Juncheng QiuJianhong ZhouQi ZhaoHanshi QinXuemei ChenElsevierarticleCobweb-shaped microchannelFlow boilingHeat transferPressure dropInstabilityEngineering (General). Civil engineering (General)TA1-2040ENCase Studies in Thermal Engineering, Vol 28, Iss , Pp 101677- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Cobweb-shaped microchannel Flow boiling Heat transfer Pressure drop Instability Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Cobweb-shaped microchannel Flow boiling Heat transfer Pressure drop Instability Engineering (General). Civil engineering (General) TA1-2040 Juncheng Qiu Jianhong Zhou Qi Zhao Hanshi Qin Xuemei Chen Numerical investigation of flow boiling characteristics in cobweb-shaped microchannel heat sink
description	In recent years, researchers have conducted extensive studies on the improvement of heat transfer performance of microchannels, however, exploiting biomimetic microchannels to enhance the flow boiling heat transfer performance is still relatively rare. In this study, inspired by the cobweb structures in nature, cobweb-shaped microchannels with horizontal inlet and outlet (CMHS-H) and cobweb-shaped microchannels with inclined inlet and outlet (CMHS-I) are proposed. Flow boiling simulations are carried out with the inlet temperature of 300 K at the bottom heat flux of 75–125 W/cm2 under different mass fluxes by utilizing volume of fluid (VOF) model. The flow boiling characteristics of the CMHS-I and CMHS-H are studied and compared with those of the rectangular microchannel heat sink (RMHS). The results demonstrate that both the CMHS-H and CMHS-I can enhance the heat transfer coefficient and reduce the wall temperature due to the flow disturbance and increased heat transfer area; whereas the CMHS-H is effective to reduce the pressure drop and suppress the flow instability at high mass flux. At high heat flux, the CMHS-H shows the best heat transfer performance and the most stable flow boiling behavior. This study provides a promising approach of using biomimetic microchannels to dissipate high heat flux associated with advanced electronics.
format	article
author	Juncheng Qiu Jianhong Zhou Qi Zhao Hanshi Qin Xuemei Chen
author_facet	Juncheng Qiu Jianhong Zhou Qi Zhao Hanshi Qin Xuemei Chen
author_sort	Juncheng Qiu
title	Numerical investigation of flow boiling characteristics in cobweb-shaped microchannel heat sink
title_short	Numerical investigation of flow boiling characteristics in cobweb-shaped microchannel heat sink
title_full	Numerical investigation of flow boiling characteristics in cobweb-shaped microchannel heat sink
title_fullStr	Numerical investigation of flow boiling characteristics in cobweb-shaped microchannel heat sink
title_full_unstemmed	Numerical investigation of flow boiling characteristics in cobweb-shaped microchannel heat sink
title_sort	numerical investigation of flow boiling characteristics in cobweb-shaped microchannel heat sink
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/2f2444c9f9ee4bf48abd088271ea8c95
work_keys_str_mv	AT junchengqiu numericalinvestigationofflowboilingcharacteristicsincobwebshapedmicrochannelheatsink AT jianhongzhou numericalinvestigationofflowboilingcharacteristicsincobwebshapedmicrochannelheatsink AT qizhao numericalinvestigationofflowboilingcharacteristicsincobwebshapedmicrochannelheatsink AT hanshiqin numericalinvestigationofflowboilingcharacteristicsincobwebshapedmicrochannelheatsink AT xuemeichen numericalinvestigationofflowboilingcharacteristicsincobwebshapedmicrochannelheatsink
_version_	1718400759641407488

Numerical investigation of flow boiling characteristics in cobweb-shaped microchannel heat sink

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