Transient natural convection flow of a nanofluid over a vertical cylinder

被引：61

作者：

Chamkha, Ali J. ^{[1
]}

Rashad, A. M. ^{[2
]}

Aly, Abdelraheem M. ^{[3
,4
]}

机构：

[1] Publ Author Appl Educ & Training, Dept Mfg Engn, Shuweikh 70654, Kuwait

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

[3] S Valley Univ, Fac Sci, Dept Math, Qena, Egypt

[4] Kyushu Univ, Fac Engn, Dept Civil Engn, Fukuoka 812, Japan

来源：

MECCANICA | 2013年 / 48卷 / 01期

关键词：

Unsteady boundary layer; Free convection; Nanofluid; Vertical cylinder; POROUS-MEDIUM; BOUNDARY-LAYER; HEAT-TRANSFER; FLUID;

D O I：

10.1007/s11012-012-9584-8

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

An analysis is performed to study unsteady free convective boundary layer flow of a nanofluid over a vertical cylinder. The model used for the nanofluid incorporates the effects of Brownian motion and thermophoresis. The governing equations are formulated and a numerical solution is obtained by using an explicit finite-difference scheme of the Crank-Nicolson type. The solutions at each time step have been found to reach the steady state solution properly. Numerical results for the steady-state velocity, temperature and nanoparticles volume fraction profiles as well as the axial distributions and the time histories of the skin-friction coefficient, Nusselt number and the Sherwood number are presented graphically and discussed.

引用

页码：71 / 81

页数：11

共 19 条

[1] Effects of inclination angle on natural convection in enclosures filled with Cu-water nanofluid [J].

Abu-Nada, Eiyad ;

Oztop, Hakan F. .

INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW, 2009, 30 (04) :669-678

[2] Unsteady natural convective power-law fluid flow past a vertical plate embedded in a non-Darcian porous medium in the presence of a homogeneous chemical reaction [J].

Chamkha, A. J. ;

Aly, A. M. ;

Mansour, M. A. .

NONLINEAR ANALYSIS-MODELLING AND CONTROL, 2010, 15 (02) :139-154

[3]

Chamkha A. J., 2010, INT J MICRO IN PRESS

[4] Non-similar Solution for Natural Convective Boundary Layer Flow Over a Sphere Embedded in a Porous Medium Saturated with a Nanofluid [J].

Chamkha, Ali ;

Gorla, Rama Subba Reddy ;

Ghodeswar, Kaustubh .

TRANSPORT IN POROUS MEDIA, 2011, 86 (01) :13-22

[5] Radiation Effects on Mixed Convection over a Wedge Embedded in a Porous Medium Filled with a Nanofluid [J].

Chamkha, Ali J. ;

Abbasbandy, S. ;

Rashad, A. M. ;

Vajravelu, K. .

TRANSPORT IN POROUS MEDIA, 2012, 91 (01) :261-279

[6] Melting Effect on Unsteady Hydromagnetic Flow of a Nanofluid Past a Stretching Sheet [J].

Chamkha, Ali J. ;

Rashad, A. M. ;

Al-Meshaiei, Eisa .

INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING, 2011, 9

[7] COMBINED HEAT AND MASS-TRANSFER IN NATURAL-CONVECTION ALONG A VERTICAL CYLINDER [J].

CHEN, TS ;

YUH, CF .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1980, 23 (04) :451-461

[8]

Choi S., 1995, ASME FED, V231, P99, DOI DOI 10.1115/1.1532008

[9] Effect of thermophysical properties models on the predicting of the convective heat transfer coefficient for low concentration nanofluid [J].

Duangthongsuk, Weerapun ;

Wongwises, Somchai .

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, 2008, 35 (10) :1320-1326

[10] Unsteady free convection on a vertical cylinder with variable heat and mass flux [J].

Ganesan, P ;

Rani, HP .

HEAT AND MASS TRANSFER, 1999, 35 (04) :259-265

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