EFFECT OF CHANNEL-CONFINEMENT AND ROTATION ON THE TWO-DIMENSIONAL LAMINAR FLOW AND HEAT TRANSFER ACROSS A CYLINDER

被引：18

作者：

Prasad, Kaushal ^{[1
]}

Paramane, Sachin B. ^{[1
]}

Agrawal, Amit ^{[1
]}

Sharma, Atul ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Mech Engn, Bombay 400076, Maharashtra, India

来源：

NUMERICAL HEAT TRANSFER PART A-APPLICATIONS | 2011年 / 60卷 / 08期

关键词：

LOW REYNOLDS-NUMBERS; POWER-LAW FLUIDS; CIRCULAR-CYLINDER; SQUARE CYLINDER; PARALLEL WALLS; BLOCKAGE RATIO; PLANE CHANNEL; VORTEX; SUPPRESSION; BIFURCATION;

D O I：

10.1080/10407782.2011.616843

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Effect of channel-confinement and rotation on the flow and heat-transfer across a cylinder is studied for various blockage ratio (beta = 0-50%), nondimensional rotational velocity (alpha = 0-2), and Reynolds number (Re = 35-170). The cylinder is maintained at a constant wall temperature with air as the working fluid. Criss-cross motion of the shed-vortices is noticed for the channel-confined flow across a rotating cylinder at intermediate blockage ratio. The effect of channel-confinement (rotation) is an enhancement (reduction) in the drag force and heat transfer. A downward lift force is generated under the influence of counterclockwise rotation, which increases with increasing blockage ratio. Rotation and channel-confinement have a stabilizing effect and can be used for flow control.

引用

页码：699 / 726

页数：28

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