SECOND LAW ANALYSIS FOR FREE CONVECTION IN NON-NEWTONIAN FLUIDS OVER A HORIZONTAL PLATE EMBEDDED IN A POROUS MEDIUM: (PRESCRIBED HEAT FLUX)

被引：4

作者：

Khan, W. A. ^{[1
]}

Gorla, R. S. R. ^{[2
]}

机构：

[1] Natl Univ Sci & Technol, Dept Engn Sci, PN Engn Coll, PNS Jauhar, Karachi 75350, Pakistan

[2] Cleveland State Univ, Dept Mech Engn, Cleveland, OH 44115 USA

来源：

BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING | 2012年 / 29卷 / 03期

关键词：

Second law; Free convection; Non-Newtonian fluids; Porous medium; Plate; 2ND-LAW ANALYSIS; LIQUID-FILM;

D O I：

10.1590/S0104-66322012000300008

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Second law characteristics of heat transfer and fluid flow clue to free convection of non-Newtonian fluids over a horizontal plate with prescribed surface heat flux in a porous medium are analyzed. Velocity and temperature fields are obtained numerically using an implicit finite difference method under the similarity assumption and these results are used to compute the entropy generation rate Ns, irreversibility ratio phi and the Bejan number Be for both Newtonian and non-Newtonian fluids. The effects of power-law index n, heat flux variation parameter lambda, and modified duty parameter, G on the dimensionless entropy generation rate Ns, and the Bejan number Be are investigated and presented graphically.

引用

页码：511 / 518

页数：8

共 10 条

[1]

Aiboud-Saouli S., 2006, Entropy, V8, P188

[2] MIXED CONVECTION OVER NONISOTHERMAL HORIZONTAL SURFACES IN A POROUS-MEDIUM - THE ENTIRE REGIME [J].

ALDOSS, TK ;

CHEN, TS ;

ARMALY, BF .

NUMERICAL HEAT TRANSFER PART A-APPLICATIONS, 1994, 25 (06) :685-701

[3]

[Anonymous], 1996, ENTROPY GENERATION M

[4] STUDY OF ENTROPY GENERATION IN FUNDAMENTAL CONVECTIVE HEAT-TRANSFER [J].

BEJAN, A .

JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 1979, 101 (04) :718-725

[5]

Bejan A., 1984, CONVECTION HEAT TRAN

[6]

Gorla Rama Subba Reddy, 2007, Entropy, V9, P30, DOI 10.3390/e9010030

[7]

Gorla RSR, 2003, HEAT MASS TRANSFER, V39, P101, DOI [10.1007/s00231-002-035i-6, 10.1007/S00231-002-0351-6]

[8]

Paoletti S., 1989, ASME AES, V10, P21

[9] Second law analysis of laminar falling liquid film along an inclined heated plate [J].

Saouli, S ;

Aiboud-Saouli, S .

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, 2004, 31 (06) :879-886

[10] SECOND-LAW ANALYSIS OF LAMINAR NON-NEWTONIAN GRAVITY-DRIVEN LIQUID FILM ALONG AN INCLINED HEATED PLATE WITH VISCOUS DISSIPATION EFFECT [J].

Saouli, S. ;

Aiboud-Saouli, S. .

BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING, 2009, 26 (02) :407-414

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