Heatline and Energy-Flux-Vector Visualization of Natural Convection in a Porous Cavity Occupied by a Fluid with Temperature-Dependent Viscosity

被引：36
作者：
Hooman, K. [1 ]
Gurgenci, H. [1 ]
Dincer, I. [2 ]
机构：
[1] Univ Queensland, Sch Engn, Brisbane, Qld 4072, Australia
[2] Univ Ottawa, Inst Technol, Fac Engn & Appl Sci, Ottawa, ON L1H 7K4, Canada
来源：
JOURNAL OF POROUS MEDIA | 2009年 / 12卷 / 03期
关键词：
FORCED-CONVECTION; BOUNDARY-CONDITIONS; FLOW;
D O I：
10.1615/JPorMedia.v12.i3.60
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Temperature-dependent viscosity effects in buoyancy-driven flow in a porous saturated enclosure is studied numerically, based on the general model of momentum transfer in a porous medium. The exponential form of the viscosity-temperature relation is applied Both cases of viscosity increase and decrease versus temperature are considered. Application of the effective Rayleigh number concept and the reference temperature approach are investigated Use of heat lines and energy flux vectors are illustrated for a more comprehensive analysis of the problem.
引用
收藏
页码：265 / 275
页数：11
相关论文
共 27 条
[1]  
Bejan A., 1984, CONVECTION HEAT TRAN
[2]  
Bejan A., 2004, Convection Heat Transfer, V3rd
[3]  
Bejan A., 2004, POROUS COMPLEX FLOW
[4]   THERMAL-CONVECTION WITH LARGE VISCOSITY VARIATION IN AN ENCLOSURE WITH LOCALIZED HEATING [J].
CHU, TY ;
HICKOX, CE .
JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 1990, 112 (02) :388-395
[5]   Lattice Boltzmann simulation of natural convection with temperature-dependent viscosity in a porous cavity [J].
Guo, ZL ;
Zhao, TS .
PROGRESS IN COMPUTATIONAL FLUID DYNAMICS, 2005, 5 (1-2) :110-117
[6]   Effects of temperature-dependent viscosity variations and boundary conditions on fully developed laminar forced convection in a semicircular duct [J].
Harms, TM ;
Jog, MA ;
Manglik, RM .
JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 1998, 120 (03) :600-605
[7]   Effects of temperature-dependent viscosity on Benard convection in a porous medium using a non-Darcy model [J].
Hooman, K. ;
Gurgenci, H. .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2008, 51 (5-6) :1139-1149
[8]   Effects of temperature-dependent viscosity variation on entropy generation, heat and fluid flow through a porous-saturated duct of rectangular cross-section [J].
Hooman, K. ;
Gurgenci, H. .
APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION, 2007, 28 (01) :69-78
[9]   Effects of viscous dissipation and boundary conditions on forced convection in a channel occupied by a saturated porous medium [J].
Hooman, K. ;
Gurgenci, H. .
TRANSPORT IN POROUS MEDIA, 2007, 68 (03) :301-319
[10]   Heatline visualization of natural convection in a porous cavity occupied by a fluid with temperature-dependent viscosity [J].
Hooman, K. ;
Gurgenci, H. .
JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 2008, 130 (01)
123