Numerical study of influence of nanoparticle shape on the natural convection in Cu-water nanofluid

被引：61

作者：

Ooi, Eon Hin ^{[1
]}

Popov, Viktor ^{[1
]}

机构：

[1] Wessex Inst Technol, Environm Fluid Mech Div, Southampton SO40 7AA, Hants, England

来源：

INTERNATIONAL JOURNAL OF THERMAL SCIENCES | 2013年 / 65卷

关键词：

Nanofluids; Spherical and spheroidal nanoparticles; Velocity-vorticity; Navier-Stokes equations; Meshless method; INTEGRAL-EQUATION METHOD; THERMAL-CONDUCTIVITY; ENHANCEMENT; ENCLOSURES; CAVITY;

D O I：

10.1016/j.ijthermalsci.2012.10.020

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The natural convection flow of the Cu-water nanofluid inside a square cavity is simulated by using the radial basis integral equation (RBIE) method. The RBIE is a meshless method and it has the benefit of solving at each node for the velocity and its spatial gradients via integral equations. The effects of the spherical and spheroidal nanoparticles (NPs) on the natural convection flow of the nanofluids are examined. The different NPs shapes and sizes were found to affect differently the thermal conductivity and the viscosity of the nanofluids. Numerical results showed that the oblate spheroid with aspect ratio of 10 produced the largest enhancement of the overall heat transfer characteristic. (C) 2012 Elsevier Masson SAS. All rights reserved.

引用

页码：178 / 188

页数：11

共 28 条

[1] Natural convection heat transfer enhancement in horizontal concentric annuli using nanofluids [J].

Abu-Nada, E. ;

Masoud, Z. ;

Hijazi, A. .

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, 2008, 35 (05) :657-665

[2]

Ang W-T, 2007, A beginner's course in boundary element methods

[3]

[Anonymous], IND ENG CHEM FUNDAME

[4] THE VISCOSITY OF CONCENTRATED SUSPENSIONS AND SOLUTIONS [J].

BRINKMAN, HC .

JOURNAL OF CHEMICAL PHYSICS, 1952, 20 (04) :571-571

[5] Domain decomposition boundary element method with overlapping sub-domains [J].

Bui, Thanh Tu ;

Popov, Viktor .

ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS, 2009, 33 (04) :456-466

[6] Particular solutions of Laplacian, Helmholtz-type, and polyharmonic operators involving higher order radial basis functions [J].

Cheng, AHD .

ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS, 2000, 24 (7-8) :531-538

[7]

Choi S., 1995, DEV APPL NONNEWTONIA, V231, P99

[8]

DEVAHLDAVIS G, 1983, INT J NUMER METH FL, V3, P249, DOI DOI 10.1002/FLD.1650030305

[9] The radial basis integral equation method for solving the Helmholtz equation [J].

Dogan, Hakan ;

Popov, Viktor ;

Ooi, Ean Hin .

ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS, 2012, 36 (06) :934-943

[10]

Duchon J, 1976, Constructive Theory of Functions of Several Variables, DOI DOI 10.1007/BFB0086566

← 1 2 3 →