Electrohydrodynamic free convection heat transfer of a nanofluid in a semi-annulus enclosure with a sinusoidal wall

被引：149

作者：

Sheikholeslami, Mohsen ^{[1
]}

Chamkha, Ali J. ^{[2
]}

机构：

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

[2] Prince Mohammad Bin Fahd Univ PMU, Dept Mech Engn, POB 1664, Al Khobar 31952, Saudi Arabia

来源：

NUMERICAL HEAT TRANSFER PART A-APPLICATIONS | 2016年 / 69卷 / 07期

关键词：

HYDROMAGNETIC FREE-CONVECTION; NATURAL-CONVECTION; MAGNETIC-FIELD; MIXED CONVECTION; AL2O3-WATER NANOFLUID; NUMERICAL-SIMULATION; SQUARE ENCLOSURE; VERTICAL ANNULI; MASS-TRANSFER; FLOW;

D O I：

10.1080/10407782.2015.1090819

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Natural convection heat transfer of a nanofluid in the presence of an electric field is investigated. The control volume finite element method (CVFEM) is utilized to simulate this problem. A Fe3O4-ethylene glycol nanofluid is used as the working fluid. The effect of the electric field on nanofluid viscosity is taken into account. Numerical investigation is conducted for several values of Rayleigh number, nanoparticle volume fraction, and the voltage supplied. The numerical results show that the voltage used can change the flow shape. The Coulomb force causes the isotherms to become denser near the bottom wall. Heat transfer rises with increase in the voltage supplied and Rayleigh number. The effect of electric field on heat transfer is more pronounced at low Rayleigh numbers due to the predomination of the conduction mechanism.

引用

页码：781 / 793

页数：13

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