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Heat Transfer Research
Импакт фактор: 0.404 5-летний Импакт фактор: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

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.2014006516
pages 507-539

NANOFLUID FLOW HEAT TRANSFER PERFORMANCE IN A SQUARE ENCLOSURE WITH DIFFERENT VENTING LOCATIONS

Mohammad Najafi
Department of Mechanical and Aerospace Engineering, Islamic Azad University, Science and Research Branch, Tehran, Iran
Mahdi Aboujafari
Department of Mechanical and Aerospace Engineering, Islamic Azad University, Tehran Science and Research Branch, Tehran, Iran
Koroush Javaherdeh
Department of Mechanical Engineering, Guilan University, Rasht, Iran

Краткое описание

This study considers mixed convection heat transfer performance of a laminar nanofluid flow through a vented two-dimensional square enclosure. The study compares the heat transfer characteristics of the nanofluid in the square enclosure for different locations of the inlet and outlet ports. The enclosure comprises two different constant-temperature top and bottom walls, with the bottom wall being at a differentially higher temperature than its counterpart, and two thermally insulated side walls. The working nanofluid considered is Cu−water with various volume fractions of its solids. The finite volume method together with the SIMPLE algorithm for a uniformly staggered grid is employed as a numerical method. In addition to varying the inlet and outlet vents locations, the Reynolds number, Richardson number, and the nanofluid volume fraction are considered as varying parameters in observing the nanofluid flow and heat transfer throughout the enclosure. To verify the accuracy of the developed computer code utilized, the results of three test cases considered in this work are compared with those of other investigators. The results of the present study show that, although locating both the inlet and outlet ports on the bottom of the two side walls show the highest rate of heat transfer from the bottom hot wall, for high Richardson numbers, locating the inlet on the bottom and the outlet on the top of the opposite side walls gives comparable heat transfer results. Therefore, in cases where the design constraints may not allow placing both the inlet and outlet ports on the bottom, locating the inlet on the bottom and the outlet on the top of the side walls is the best option to secure the highest heat transfer rate from the bottom hot wall.


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