Mixed convection - Radiation in power-law fluids along a non-isothermal wedge in a porous medium with variable permeability

被引：5

作者：

Mansour, MA ^{[1
]}

El-Shaer, NA

机构：

[1] Assiut Univ, Dept Math, Assiut Fac Sci, Assiut, Egypt

[2] S Valley Univ, Dept Math, Aswan Fac Sci, Aswan, Egypt

来源：

TRANSPORT IN POROUS MEDIA | 2004年 / 57卷 / 03期

关键词：

mixed convection; power-law fluids; convection-radiation; interaction; porous medium;

D O I：

10.1007/s11242-004-4059-6

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A boundary layer analysis has been presented for the interaction of mixed convection with thermal radiation in laminar boundary flow from a vertical wedge in a porous medium saturated with a power-law type non-Newtonian incorporating the variation of permeability and thermal conductivity. The transformed conservation laws are solved numerically for the case of variable surface temperature conditions. The combined convection non-similar parameter chi = [1 + (Ra-x/Pe(x))(1/2)](-1), we note that chi = 0 and 1 correspond to pure free and forced convection cases. The Rosseland approximation is used to describe the radiative heat flux in energy equation. Velocity and temperature profiles as well as the local Nusselt number are presented.

引用

页码：333 / 346

页数：14

共 16 条

[1] VOID FRACTION DISTRIBUTION IN BEDS OF SPHERES [J].

BENENATI, RF ;

BROSILOW, CB .

AICHE JOURNAL, 1962, 8 (03) :359-361

[2] SIMILARITY SOLUTIONS FOR BUOYANCY INDUCED FLOWS IN A SATURATED POROUS-MEDIUM ADJACENT TO IMPERMEABLE HORIZONTAL SURFACES [J].

CHANDRASEKHARA, BC ;

NAMBOODIRI, PMS ;

HANUMANTHAPPA, AR .

WARME UND STOFFUBERTRAGUNG-THERMO AND FLUID DYNAMICS, 1984, 18 (01) :17-23

[3] INFLUENCE OF VARIABLE PERMEABILITY ON COMBINED FREE AND FORCED-CONVECTION ABOUT INCLINED SURFACES IN POROUS-MEDIA [J].

CHANDRASEKHARA, BC ;

NAMBOODIRI, PMS .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1985, 28 (01) :199-206

[4]

CHANDRASEKHARA BC, IN PRESS I INDIAN J

[5]

CHANDRASEKHARA BC, 1983, P 12 NAT C FLUID DYN

[6] Non-Darcy mixed convection along nonisothermal vertical surfaces in porous media [J].

Chen, CH ;

Chen, TS ;

Chen, CK .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1996, 39 (06) :1157-1164

[7] POWER-LAW FLOW THROUGH A PACKED TUBE [J].

CHRISTOPHER, RH ;

MIDDLEMAN, S .

INDUSTRIAL & ENGINEERING CHEMISTRY FUNDAMENTALS, 1965, 4 (04) :422-+

[8] Thermal radiation effect on non-Darcy natural convection with lateral mass transfer [J].

El-Hakiem, MA ;

El-Amin, MF .

HEAT AND MASS TRANSFER, 2001, 37 (2-3) :161-165

[9] CONJUGATE HEAT-TRANSFER WITH RADIATION FROM A VERTICAL CIRCULAR PIN IN A NON-NEWTONIAN AMBIENT MEDIUM [J].

GORLA, RSR ;

POP, I .

WARME UND STOFFUBERTRAGUNG-THERMO AND FLUID DYNAMICS, 1993, 28 (1-2) :11-15

[10] RADIATIVE EFFECT ON CONJUGATE FORCED-CONVECTION AND CONDUCTIVE HEAT-TRANSFER IN A CIRCULAR PIN [J].

GORLA, RSR .

INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW, 1988, 9 (01) :49-52

← 1 2 →