Abonnement à la biblothèque: Guest
Portail numérique Bibliothèque numérique eBooks Revues Références et comptes rendus Collections
Heat Transfer Research
Facteur d'impact: 1.199 Facteur d'impact sur 5 ans: 1.155 SJR: 0.267 SNIP: 0.503 CiteScore™: 1.4

ISSN Imprimer: 1064-2285
ISSN En ligne: 2162-6561

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

Heat Transfer Research

DOI: 10.1615/HeatTransRes.2016011093
pages 839-854

EFFECT OF PERIODICALLY ALTERNATING WALL TEMPERATURE ON NATURAL CONVECTION HEAT TRANSFER ENHANCEMENT IN A SQUARE CAVITY FILLED WITH Cu-WATER NANOFLUIDS

Xi Meng
College of Architecture and Urban-Rural Planning, Sichuan Agricultural University, Chengdu 610065, P.R. China
Yan Wang
Institute for Disaster Management and Reconstruction, Sichuan University, Chengdu 610065, P.R. China
Jun Wang
College of Architecture and Environment, Sichuan University
Enshen Long
Institute for Disaster Management and Reconstruction, Sichuan University, Chengdu 610065, P.R. China

RÉSUMÉ

Natural convective heat transfer of copper--water nanofluids in a square enclosure with sinusodally alternating temperature at one vertical wall, relatively low temperature at the opposite sidewall, and adiabatic at the other walls is investigated. The transport equations are solved numerically by finite volume approach using the SIMPLEC algorithm. Calculations are performed for the Rayleigh number from 104 to 106, nanoparticle volume fractions from 0 to 0.2, dimensionless amplitude from 0 to 1.0, and dimensionless frequency from 0.1 to 200. The fluctuating behaviors are found for the flow fields and temperature fields as a result of the alternating temperature. The utilization of nanoparticles enhances heat transfer especially at high Rayleigh numbers, and the percentage increase in the time-averaged Nusselt number is 37.61%, when the solid volume fraction is increased from 0 to 0.2. In addition, the alternating temperature amplitude and frequency affect heat transfer of nanofluids. When the dimensionless amplitude is increased from 0 to 1, the percentage increase in the time-averaged Nusselt number is 12.24%. The double-humped resonance phenomenon of nanofluids heat transfer is observed for variation of the temperature oscillation frequency.


Articles with similar content:

EFFECT OF HEATING LOCATION ON STABILITY OF NATURAL CONVECTION IN A SQUARE ENCLOSURE
ICHMT DIGITAL LIBRARY ONLINE, Vol.0, 2012, issue
Djoubeir Debbah , Omar Kholai, Saadoun Boudebous
MIXED CONVECTION AND ITS INTERACTION WITH SURFACE RADIATION IN A DIFFERENTLY HEATED ENCLOSURE: A CRITICAL APRAISAL
Heat Transfer Research, Vol.44, 2013, issue 6
Amitava Sarkar, Swarup Kumar Mahapatra, Sikata Samantaray
MIXED CONVECTION OF NANOFLUID OVER A BACKWARD FACING STEP UNDER THE EFFECTS OF A TRIANGULAR OBSTACLE AND INCLINED MAGNETIC FIELD
Computational Thermal Sciences: An International Journal, Vol.10, 2018, issue 6
Hakan F. Öztop, Fatih Selimefendigil
NUMERICAL STUDY ON THE EFFECT OF MAGNETIC FIELD IN A POROUS ENCLOSURE USING NANOFLUID WITH MID-HORIZONTAL MOVING LID: BRINKMAN-FORCHHEIMER EXTENDED DARCY MODEL
Journal of Porous Media, Vol.21, 2018, issue 5
N. Nithyadevi, A. Shamadhani Begum
HEATLINE VISUALIZATION OF NATURAL CONVECTION IN AN INCLINED SQUARE POROUS ENCLOSURE WITH SINUSOIDAL BOUNDARY CONDITIONS
Journal of Porous Media, Vol.16, 2013, issue 10
Habibis Saleh, Ishak Hashim