The dynamics of vortex streets in channels
@article{Wang2015TheDO, title={The dynamics of vortex streets in channels}, author={Xiaolin Wang and Silas Alben}, journal={Physics of Fluids}, year={2015}, volume={27}, pages={073603} }
We develop a model to numerically study the dynamics of vortex streets in channel flows. Previous work has studied the vortex wakes of specific vortex generators. Here, we study a wide range of vortex wakes including regular and reverse von Karman streets with various strengths, geometries, and Reynolds numbers (Re) by applying a smoothed von Karman street as an inflow condition. We find that the spatial structure of the inflow vortex street is maintained for the reverse von Karman street and…
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References
SHOWING 1-10 OF 62 REFERENCES
On vortex street wakes
- PhysicsJournal of Fluid Mechanics
- 1967
The flow in the wake of a two-dimensional blunt-trailing-edge body was investigated in the Reynolds number range, Reynolds number being referred to base height, 1·3 × 104 to 4·1 × 104. The effects of…
On the inversion of the von Kármán street in the wake of a confined square cylinder
- PhysicsJournal of Fluid Mechanics
- 2007
This paper considers the incompressible two-dimensional laminar flow around a square cylinder symmetrically positioned in a channel. In this type of flow, even if vortices of opposite sign are…
Vortex wakes of a flapping foil
- PhysicsJournal of Fluid Mechanics
- 2009
We present an experimental study of a symmetric foil performing pitching oscillations in a vertically flowing soap film. By varying the frequency and amplitude of the oscillation we visualize a…
Transitions in the wake of a flapping foil.
- PhysicsPhysical review. E, Statistical, nonlinear, and soft matter physics
- 2008
It is shown that the transition from a B vK wake to a reverse BvK wake precedes the actual drag-thrust transition and the significance of the present results in the analysis of flapping systems in nature is discussed.
The vortex-shedding process behind two-dimensional bluff bodies
- Physics, EngineeringJournal of Fluid Mechanics
- 1982
Using a variety of flow-visualization techniques, the flow behind a circular cylinder has been studied. The results obtained have provided a new insight into the vortex-shedding process. Using…
An inviscid model of two-dimensional vortex shedding
- PhysicsJournal of Fluid Mechanics
- 1973
An inviscid model of two-dimensional vortex shedding behind a square-based section is developed. The model uses a discrete-vortex approximation for the free shear layers. The motion of the shear…
On the symmetry breaking instability leading to vortex shedding
- Physics, Engineering
- 1997
It is well known that at early stages an impulsively started flow past a circular cylinder consists of twin vortices which are images of one another by reflection through the mid-plane. While the…
Unsteady flow in a channel obstructed by a square rod (crisscross motion of vortex)
- Physics, Engineering
- 1993
Vortex Dynamics in the Cylinder Wake
- Physics
- 1996
Since the review of periodic flow phenomena by Berger & Wille (1972) in this journal, over twenty years ago, there has been a surge of activity regarding bluff body wakes. Many of the questions…