Abonnement à la biblothèque: Guest
Portail numérique Bibliothèque numérique eBooks Revues Références et comptes rendus Collections
Heat Transfer Research
Facteur d'impact: 0.404 Facteur d'impact sur 5 ans: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

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

Volumes:
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.2012002036
pages 259-284

INVESTIGATING THE NATURAL CONVECTION HEAT TRANSFER FROM TWO ELLIPTIC CYLINDERS IN A CLOSED CAVITY AT DIFFERENT CYLINDER SPACINGS

Seyyed Mohammad Ali Noori Rahim Abadi
University of Pretoria
Arian Jafari
School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran

RÉSUMÉ

A numerical investigation is presented to survey the laminar natural convection heat transfer around two elliptic cylinders with different vertical spacings relative to each other in a closed cavity. The numerical model used in this paper is based on a 2D Navier-Stokes incompressible flow momentum and energy equations solver on an unstructured grid. Discretization of the governing equations that include the continuity, momentum, and energy equations is achieved through a finite element scheme based on the Characteristic Based Split (CBS) algorithm. The working fluid is assigned a Prandtl number of 0.71 (air) and assumed to be incompressible with constant physical properties. The radiation, viscous dissipation, and pressure work are also assumed to be negligible throughout this investigation. Fluid flow and heat transfer characteristics are examined in the range of the Rayleigh number, cylinders spacing, and cylinders' orientation such that: 103 ≤ Ra ≤ 106, 1 ≤ s/a ≤ 4, and b/a = 0.67, 1.5. It is also assumed that cylinders' location can be changed vertically along the square cavity centerline. The local and average Nusselt numbers streamlines, and isotherms are presented for various relevant dimensionless groups. The obtained results reveal that the Rayleigh number and cylinders' position would change magnitude and patterns of streamlines and isotherms.


Articles with similar content:

THE EFFECTS OF POROSITY AND MASS-TO-THERMAL DRIVE RATIO ON AIDING AND OPPOSING CONVECTION IN POROUS ENCLOSURES
Journal of Enhanced Heat Transfer, Vol.25, 2018, issue 4-5
Marcelo J. S. de Lemos, Paulo H.S. Carvalho
BUOYANCY RATIO AND POROSITY EFFECTS ON AIDING AND OPPOSING DOUBLE-DIFFUSIVE CONVECTION IN POROUS MEDIA
ICHMT DIGITAL LIBRARY ONLINE, Vol.0, 2017, issue
Marcelo J. S. de Lemos, Paulo H.S. Carvalho
RADIAL BASIS FUNCTION PSEUDO-SPECTRAL SOLUTION OF THE NON-DARCY MODEL IN A POROUS MEDIUM
Journal of Porous Media, Vol.20, 2017, issue 6
Bengisen Pekmen
DOUBLE DIFFUSIVE NATURAL CONVECTION IN A SQUARE ENCLOSURE FILLED WITH COPPER-WATER NANOFLUID INDUCED BY OPPOSITE TEMPERATURE AND CONCENTRATION GRADIENTS
Computational Thermal Sciences: An International Journal, Vol.10, 2018, issue 4
Natesan Saritha, A. Senthil Kumar
Magnetohydrodynamic Free Convection Heat Transfer in a Square Enclosure heated from side and cooled from the ceiling
Computational Thermal Sciences: An International Journal, Vol.3, 2011, issue 3
Zeynab Talea'pour, Mostafa Mahmoodi