Доступ предоставлен для: Guest
Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
Heat Transfer Research
Импакт фактор: 1.199 5-летний Импакт фактор: 1.155 SJR: 0.267 SNIP: 0.503 CiteScore™: 1.4

ISSN Печать: 1064-2285
ISSN Онлайн: 2162-6561

Выпуски:
Том 51, 2020 Том 50, 2019 Том 49, 2018 Том 48, 2017 Том 47, 2016 Том 46, 2015 Том 45, 2014 Том 44, 2013 Том 43, 2012 Том 42, 2011 Том 41, 2010 Том 40, 2009 Том 39, 2008 Том 38, 2007 Том 37, 2006 Том 36, 2005 Том 35, 2004 Том 34, 2003 Том 33, 2002 Том 32, 2001 Том 31, 2000 Том 30, 1999 Том 29, 1998 Том 28, 1997

Heat Transfer Research

DOI: 10.1615/HeatTransRes.2016012144
pages 893-914

ANALYSIS OF THE HYDRAULIC AND THERMAL PERFORMANCES OF A MICROCHANNEL HEAT SINK WITH EXTENDED-NOZZLE IMPINGING JETS

Tingzhen Ming
University of North Texas School of Civil Engineering and Architecture, Wuhan University of Technology
J. L. Gui
School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
C. Peng
School of Architecture and Urban Planning, Huazhong University of Science and Technology, Wuhan, 430074, China
Y. Tao
College of Engineering and Computing, Nova Southeastern University, Davie 33314, FL U.S.A.

Краткое описание

A strong transverse main stream from upstream impinging jets will cause the flow direction of the downstream impinging jets to deflect greatly, which will significantly deteriorate the thermal performance of the microchannel heat sink with impinging jets. An idea of extending the length of the nozzles for the impinging jets has been introduced to avoid this negative effect and ultimately to enhance the thermal performance of microchannel heat sink jets. Mathematical models describing the fluid flow and heat transfer characteristics of the microchannel heat sink with extended-nozzle impinging jets (MHSEIJ) have been presented, and the thermal and hydraulic performances of the MHSEIJ with the lengths of extended nozzles being 0, 0.5, and 1.0 mm have been numerically investigated. From the results we can fi nd that: (1) the introduction of extended nozzles for impinging jets can greatly avoid the negative effect of the transverse main stream from upstream impinging jets; (2) increasing the length of extended nozzles will achieve better thermal performance of the MHSEIJ , accompanied by a reasonable increase in flow resistance; and (3) when Re is 18,000, the values of Nu are 258.15163 and 302.07749 for the MHSEIJ, with Le being 0 mm and 1.0 mm, causing an increase of 17%.


Articles with similar content:

Heat Transfer Measurement of Confined Multiple Impinging Slot Jets without Cross-Flow Effects
International Heat Transfer Conference 12, Vol.13, 2002, issue
Bengt Sunden, Xiufang Gao
The Results of Experimental Investigation into Rational Intensification of Convective Heat Transfer in Rectangular Channels with Protrusions and Grooves Having a Smoothly Rounded Two-Dimensional Cross Section
Heat Transfer Research, Vol.37, 2006, issue 2
Victor Ya. Vasiliev
RELATIVE THERMO-HYDRAULIC PERFORMANCE OF DUCTS OF SQUARE AND CIRCULAR CROSS SECTIONS WITH TWISTED TAPE INSERTS
International Heat Transfer Conference 11, Vol.13, 1998, issue
Anil W. Date, S. Ray
A NUMERICAL INVESTIGATION OF FLOW STRUCTURE AND HEAT TRANSFER ENHANCEMENT IN SQUARE RIBBED CHANNELS WITH DIFFERENTLY POSITIONED DEFLECTORS
Journal of Enhanced Heat Transfer, Vol.20, 2013, issue 3
Bengt Sunden, Gongnan Xie, Shaofei Zheng, Weihong Zhang
An Experimental Study on Droplet Interactions
International Journal of Fluid Mechanics Research, Vol.24, 1997, issue 4-6
J. F. Virepinte, G. Lavergne, Y. Biscos, O. Adam