Natural convection in a nanofluid filled concentric annulus between an outer square cylinder and an inner elliptic cylinder

被引：0

作者：

Sheikholeslami, M. ^{[1
]}

Gorji-Bandpy, M. ^{[1
]}

Ganji, D. D. ^{[1
]}

机构：

[1] Babol Univ Technol, Dept Mech Engn, Babol Sar, Iran

来源：

SCIENTIA IRANICA | 2013年 / 20卷 / 04期

关键词：

Elliptic cylinder; Natural convection; Lattice Boltzmann method; Nanofluid; Concentric annulus; HORIZONTAL CYLINDRICAL ANNULUS; HEAT-TRANSFER ENHANCEMENT; FLOW; ENCLOSURE; CAVITY; SIMULATION;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The lattice Boltzmann method is applied to investigate the natural convection flow of a nanofluid in a concentric annulus between a cold outer square cylinder and a heated inner elliptic cylinder. In order to simulate the effective thermal conductivity and viscosity of nanofluid, Maxwell-Garnetts (MG) and Brinkman models are used, respectively. This investigation is compared with other numerical methods and found to be in excellent agreement. Numerical results for flow and heat transfer characteristics are obtained for various values of the nanoparticle volume fraction, Rayleigh number and eccentricity. The results show that the minimum value of enhancement of heat transfer occurs at epsilon = 0.95 for Ra = 10(5), but, for other values of Rayleigh number, is obtained at epsilon = 0.65. (C) 2013 Sharif University of Technology. All rights reserved.

引用

页码：1241 / 1253

页数：13

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