Mixed convective transport in a lid-driven cavity containing a nanofluid and a rotating circular cylinder at the center

被引：75

作者：

Chatterjee, Dipankar ^{[1
]}

Gupta, Satish Kumar ^{[2
]}

Mondal, Bittagopal ^{[1
]}

机构：

[1] CSIR Cent Mech Engn Res Inst, Simulat & Modeling Lab, Durgapur 713209, India

[2] Natl Inst Technol, Dept Mech Engn, Durgapur 713209, India

来源：

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER | 2014年 / 56卷

关键词：

Lid-driven cavity; Rotating circular cylinder; Mixed convection; Nanofluid; HEAT-TRANSFER ENHANCEMENT; NATURAL-CONVECTION; SQUARE CAVITY;

D O I：

10.1016/j.icheatmasstransfer.2014.06.002

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The mixed convective transport of Cu-H2O nanofluid in a differentially heated and lid-driven square enclosure in the presence of a rotating circular cylinder is investigated numerically. The top wall of the enclosure is sliding from left to right at a uniform speed while all other walls are stationary. A thermally insulated circular cylinder is placed centrally within the enclosure. The cylinder can rotate about its centroidal axis. The top and bottom walls are kept isothermal at different temperatures while the side walls are assumed adiabatic. Simulations are performed for, Richardson number 1 <= Ri <= 10, dimensionless rotational speed 0 <= Omega <= 5 and nanoparticle concentration 0 <= phi <= 0.20 keeping the Grashof number fixed as Gr = 10(4). The flow and thermal fields are analyzed through streamline and isotherm plots for various Omega and Ri. Furthermore, the drag coefficient of the moving lid and Nusselt number of the hot wall are also computed to understand the effects of Omega and Ri on them. It is observed that the heat transfer greatly depends on the rotational speed of the cylinder, mixed convective strength and the nanoparticle concentration. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：71 / 78

页数：8

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