Abonnement à la biblothèque: Guest
Portail numérique Bibliothèque numérique eBooks Revues Références et comptes rendus Collections
Journal of Porous Media
Facteur d'impact: 1.49 Facteur d'impact sur 5 ans: 1.159 SJR: 0.43 SNIP: 0.671 CiteScore™: 1.58

ISSN Imprimer: 1091-028X
ISSN En ligne: 1934-0508

Volumes:
Volume 23, 2020 Volume 22, 2019 Volume 21, 2018 Volume 20, 2017 Volume 19, 2016 Volume 18, 2015 Volume 17, 2014 Volume 16, 2013 Volume 15, 2012 Volume 14, 2011 Volume 13, 2010 Volume 12, 2009 Volume 11, 2008 Volume 10, 2007 Volume 9, 2006 Volume 8, 2005 Volume 7, 2004 Volume 6, 2003 Volume 5, 2002 Volume 4, 2001 Volume 3, 2000 Volume 2, 1999 Volume 1, 1998

Journal of Porous Media

DOI: 10.1615/JPorMedia.v16.i2.70
pages 167-182

UNSTEADY DOUBLE-DIFFUSIVE NATURAL CONVECTION AND THERMAL RADIATION WITHIN A VERTICAL POROUS ENCLOSURE

Abdesslem Jbara
The National School of Engineers, University of Monastir, Ibn Aljazzar Street, 5019, Monastir, Tunisia
Hosni Souheil Harzallah
The National School of Engineers - University of Monastir, 5019, Tunisia
Khalifa Slimi
ISTLS
Abdallah Mhimid
Laboratory of Thermal and Energetic Systems Studies (LESTE) at the National School of Engineering of Monastir, 5019 Ibn Eljazzar Street, University of Monastir

RÉSUMÉ

Heat and mass transfer by double-diffusive natural convection and thermal radiation in a porous cavity opened at its top end, insulated at the bottom wall, and filled with a fluid-saturated porous medium has been numerically investigated. The porous medium, at local thermal equilibrium assumption, is considered as a fictitious homogeneous, isotropic, and participating medium that can emit, absorb, and scatter isotropically radiative energy. The side vertical walls of the enclosure are isothermal and gray. In this paper, a physical phenomena description has been presented and a sensitivity study of fluid flow and heat and mass transfer to different controlling radiative parameters, such as the particular emissivity ε, the optical thickness τD, the single scattering albedo ω, and the conduction−radiation parameter N, has been performed. The results indicate that the temperature and the axial velocity values are increased when ε and τD are increased or when ω and N are decreased. Moreover, the concentration values are decreased when ε and τD are increased or when ω and N are decreased.


Articles with similar content:

UNSTEADY NATURAL CONVECTION IN AN ANISOTROPIC POROUS MEDIUM BOUNDED BY FINITE THICKNESS WALLS
Computational Thermal Sciences: An International Journal, Vol.2, 2010, issue 5
Abdelaziz Zegnani, Hosni Souheil Harzallah, Hacen Dhahri, Abdallah Mhimid, Khalifa Slimi
DIRECT NUMERICAL SIMULATION OF TURBULENT CONCENTRIC ANNULAR PIPE FLOW
TSFP DIGITAL LIBRARY ONLINE, Vol.2, 2001, issue
Gwang Hoon Rhee, Seo Yoon Chung, Hyung Jin Sung
A Two-Temperature Model for Predicting Heat and Fluid Flow by Natural Convection and Radiation within a Saturated Porous Vertical Channel
Journal of Porous Media, Vol.12, 2009, issue 1
Khalifa Slimi
THERMOPHORESIS EFFECT ON THE FREE CONVECTIVE FLOW IN A DIFFERENTIALLY HEATED SQUARE CAVITY
Computational Thermal Sciences: An International Journal, Vol.7, 2015, issue 4
Serban R. Pop, Teodor Grosan
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