Numerical simulation of vortex shedding past a circular cylinder under the influence of buoyancy

被引：87
|
作者：
Patnaik, BSV
Narayana, PAA [1 ]
Seetharamu, KN
机构：
[1] Indian Inst Technol, Dept Appl Mech, Madras 600036, Tamil Nadu, India
[2] Indian Inst Technol, Dept Mech Engn, Madras 600036, Tamil Nadu, India
来源：
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 1999年 / 42卷 / 18期
关键词：
D O I：
10.1016/S0017-9310(98)00373-1
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Flow past an isolated circular cylinder is numerically simulated, under the influence of aiding and opposing buoyancy. A modified velocity correction procedure is incorporated. Galerkin weighted residual formulation is employed for spatial discretization along with a second-order Runge-Kutta (R-K) time integration scheme. The influence of buoyancy on the Nusselt number, wake structures, temporal lift and drag forces have been studied. At low Reynolds numbers (for, e.g., Re=20-40), buoyancy opposing the flow could trigger vortex shedding. The degeneration of the Karman vortex street into twin vortices is numerically simulated for a heated cylinder. The two zones of vortex shedding and twin vortices are demarcated. (C) 1999 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：3495 / 3507
页数：13
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