图书馆订阅: Guest
Begell Digital Portal Begell 数字图书馆 电子图书 期刊 参考文献及会议录 研究收集
多孔介质期刊
影响因子: 1.752 5年影响因子: 1.487 SJR: 0.43 SNIP: 0.762 CiteScore™: 2.3

ISSN 打印: 1091-028X
ISSN 在线: 1934-0508

多孔介质期刊

DOI: 10.1615/JPorMedia.v18.i4.50
pages 415-435

EFFECTS OF INTERNAL HEAT GENERATION OR ABSORPTION ON HEAT TRANSFER AND FLUID FLOW WITHIN PARTIALLY HEATED SQUARE ENCLOSURE: HOMOGENEOUS FLUIDS AND POROUS MEDIA

Najib Hdhiri
University of Tunis El Manar, Faculty of Sciences of Tunis, Laboratory of Fluid Mechanics, Department of Physics, 2092 Tunis, Tunisia
Brahim Ben-Beya
Laboratory of Physics of Fluids, Physics Department, Faculty of Science of Tunis, University of Tunis El-Manar, 2092 El-Manar 2, Tunis, Tunisia
Taieb Lili
University of Tunis El Manar, Faculty of Sciences of Tunis, Laboratory of Fluid Mechanics, Department of Physics, 2092 Tunis, Tunisia

ABSTRACT

The effects of internal heat generation or absorption on heat transfer and fluid flow within a partially heated square cavity for both homogeneous medium and porous medium are investigated in the current study. The Darcy−Brinkman and the energy transport equations are used to predict the heat transfer process in the porous medium when it is generated by heating at the bottom walls of the cavity. Numerical results are presented and analyzed in terms of fluid flow, thermal field structures, as well as average Nusselt number profiles over a wide range of dimensionless quantities [internal Rayleigh number (RaI) varied between −106 and 106, heat source length, porosity coefficient values, and Darcy number in the range 10−5 to 10−2]. The effect of heat generation and absorption in the homogenous medium and porous medium is also discussed. It was seen that an optimal heat transfer rate is obtained for both high internal Rayleigh number and high porosity coefficient (ε = 0.8 and RaI = 106, whereas a lower thermal rate was found in the first computations for (ε = 0.4 and RaI = 105). The correlations of heat transfer rates in both homogenous and porous medium cases are established in the current investigation.


Articles with similar content:

FLOW SIMULATION AND MIXED CONVECTION IN A LID-DRIVEN SQUARE CAVITY WITH SATURATED POROUS MEDIA
Journal of Porous Media, Vol.17, 2014, issue 6
P. A. Lakshmi Narayana, P. K. Jena, A. K. Nayak
NATURAL CONVECTION OF HEAT TRANSFER FOR NANOFLUID IN A PARTIALLY OPEN CAVITY WITH INTERNAL HEAT GENERATION: NON-DARCY EFFECT
Journal of Porous Media, Vol.19, 2016, issue 9
N. Nithyadevi, Muthu Rajarathinam
NON-DARCY AND LOCALIZED HEATING EFFECTS ON BENARD CONVECTION IN POROUS ENCLOSURE
Journal of Porous Media, Vol.16, 2013, issue 1
Habibis Saleh, Ishak Hashim
TURBULENT BUOYANT FLOWS IN ENCLOSURES
International Heat Transfer Conference 9, Vol.2, 1990, issue
Antonio C. M. Sousa, Enrico Nobile, Giovanni S. Barozzi
NON-DARCY EFFECTS ON THREE-DIMENSIONAL NATURAL CONVECTION IN A POROUS BOX
International Heat Transfer Conference 13, Vol.0, 2006, issue
R. P. Sharma, Ram Vinoy Sharma