Numerical study of the fluid dynamics and heat transfer for shear-thinning nanofluids in a micro pin-fin heat sink

The ability to enhance heat transfer rates of shear-thinning fluids in microchannel devices is evaluated numerically for steady and time-dependent flows in the range of 400 < Re < 2000. The geometry used represents a simplified micro pin-fin heat sink device with a staggered circular pin arran...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	A. González, O. Ruz, E. Castillo
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Microchannels Micro pin-fin heat sink Shear-thinning fluids Nanofluids Numerical simulation Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/29dcfe350e4c4b04b84a84da48673209
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:29dcfe350e4c4b04b84a84da48673209
record_format	dspace
spelling	oai:doaj.org-article:29dcfe350e4c4b04b84a84da486732092021-11-12T04:33:52ZNumerical study of the fluid dynamics and heat transfer for shear-thinning nanofluids in a micro pin-fin heat sink2214-157X10.1016/j.csite.2021.101635https://doaj.org/article/29dcfe350e4c4b04b84a84da486732092021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2214157X2100798Xhttps://doaj.org/toc/2214-157XThe ability to enhance heat transfer rates of shear-thinning fluids in microchannel devices is evaluated numerically for steady and time-dependent flows in the range of 400 < Re < 2000. The geometry used represents a simplified micro pin-fin heat sink device with a staggered circular pin arrangement. The working fluids are composed by water and ethylene-glycol with different kinds of nanoparticles and concentrations. Four Newtonian and five non-Newtonian nanofluids are evaluated in detail, focusing on their rheological behavior, the heat extraction capacity, and the fluid dynamics developed for each flow condition. The nanofluids studied are extracted from experimental articles, and they are characterized as shear-thinning power-law ones with power-law indexes in the range 0.4946 < n < 0.69. Comparisons of heat-flux between the inlet and the outlet of the microchannel are investigated for nine different Reynolds numbers. Additionally, the pressure drop was evaluated for each case. The results show that the shear-thinning behavior of the nanofluids is the most critical factor in enhancing heat transfer rates due to the promotion of unsteady flows even for low Reynolds number values and a reduction of pressure drop. A large number of numerical tests are presented and carefully analyzed to justify our claims.A. GonzálezO. RuzE. CastilloElsevierarticleMicrochannelsMicro pin-fin heat sinkShear-thinning fluidsNanofluidsNumerical simulationEngineering (General). Civil engineering (General)TA1-2040ENCase Studies in Thermal Engineering, Vol 28, Iss , Pp 101635- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Microchannels Micro pin-fin heat sink Shear-thinning fluids Nanofluids Numerical simulation Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Microchannels Micro pin-fin heat sink Shear-thinning fluids Nanofluids Numerical simulation Engineering (General). Civil engineering (General) TA1-2040 A. González O. Ruz E. Castillo Numerical study of the fluid dynamics and heat transfer for shear-thinning nanofluids in a micro pin-fin heat sink
description	The ability to enhance heat transfer rates of shear-thinning fluids in microchannel devices is evaluated numerically for steady and time-dependent flows in the range of 400 < Re < 2000. The geometry used represents a simplified micro pin-fin heat sink device with a staggered circular pin arrangement. The working fluids are composed by water and ethylene-glycol with different kinds of nanoparticles and concentrations. Four Newtonian and five non-Newtonian nanofluids are evaluated in detail, focusing on their rheological behavior, the heat extraction capacity, and the fluid dynamics developed for each flow condition. The nanofluids studied are extracted from experimental articles, and they are characterized as shear-thinning power-law ones with power-law indexes in the range 0.4946 < n < 0.69. Comparisons of heat-flux between the inlet and the outlet of the microchannel are investigated for nine different Reynolds numbers. Additionally, the pressure drop was evaluated for each case. The results show that the shear-thinning behavior of the nanofluids is the most critical factor in enhancing heat transfer rates due to the promotion of unsteady flows even for low Reynolds number values and a reduction of pressure drop. A large number of numerical tests are presented and carefully analyzed to justify our claims.
format	article
author	A. González O. Ruz E. Castillo
author_facet	A. González O. Ruz E. Castillo
author_sort	A. González
title	Numerical study of the fluid dynamics and heat transfer for shear-thinning nanofluids in a micro pin-fin heat sink
title_short	Numerical study of the fluid dynamics and heat transfer for shear-thinning nanofluids in a micro pin-fin heat sink
title_full	Numerical study of the fluid dynamics and heat transfer for shear-thinning nanofluids in a micro pin-fin heat sink
title_fullStr	Numerical study of the fluid dynamics and heat transfer for shear-thinning nanofluids in a micro pin-fin heat sink
title_full_unstemmed	Numerical study of the fluid dynamics and heat transfer for shear-thinning nanofluids in a micro pin-fin heat sink
title_sort	numerical study of the fluid dynamics and heat transfer for shear-thinning nanofluids in a micro pin-fin heat sink
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/29dcfe350e4c4b04b84a84da48673209
work_keys_str_mv	AT agonzalez numericalstudyofthefluiddynamicsandheattransferforshearthinningnanofluidsinamicropinfinheatsink AT oruz numericalstudyofthefluiddynamicsandheattransferforshearthinningnanofluidsinamicropinfinheatsink AT ecastillo numericalstudyofthefluiddynamicsandheattransferforshearthinningnanofluidsinamicropinfinheatsink
_version_	1718431220729118720

Numerical study of the fluid dynamics and heat transfer for shear-thinning nanofluids in a micro pin-fin heat sink

Ejemplares similares