The three-dimensional stability of vortex systems in circular tubes or outside a circular cylinder

1990 ◽  
Author(s):  
Z. RUSAK ◽  
A. SEGINER
Keyword(s):  
Circular Cylinder ◽  
Dimensional Stability ◽  
Three Dimensional ◽  
Circular Tubes ◽  
Vortex Systems

Effect of confinement on three-dimensional stability in the wake of a circular cylinder

2009 ◽  
Vol 642 ◽  
pp. 477-487 ◽  
Author(s):  
SIMONE CAMARRI ◽  
FLAVIO GIANNETTI
Keyword(s):  
Stability Analysis ◽  
Circular Cylinder ◽  
Linear Stability ◽  
Linear Stability Analysis ◽  
Dimensional Stability ◽  
Opposite Sign ◽  
Three Dimensional ◽  
The Body ◽  
Karman Street

This paper investigates the three-dimensional stability of the wake behind a symmetrically confined circular cylinder by a linear stability analysis. Emphasis has been placed on discussing analogies and differences with the unconfined case to highlight the role of the inversion of the von Kármán street in the nature of the three-dimensional transition. Indeed, in this flow, the vortices of opposite sign that are alternately shed from the body into the wake cross the symmetry line further downstream and they assume a final configuration which is inverted with respect to the unconfined case. It is shown that the transition to a three-dimensional state has the same space–time symmetries of the unconfined case, although the shape of the linearly unstable modes is affected by the inversion of the wake vortices. A possible interpretation of this result is given here.

scholarly journals Three dimensional flow around a circular cylinder confined in a plane channel

2011 ◽  
Vol 23 (6) ◽  
pp. 064106 ◽  
Author(s):  
Nicolas Kanaris ◽  
Dimokratis Grigoriadis ◽  
Stavros Kassinos
Keyword(s):  
Circular Cylinder ◽  
Three Dimensional ◽  
Plane Channel ◽  
Three Dimensional Flow ◽  
Dimensional Flow

Liutex force field model applied to three-dimensional flows around a circular cylinder at Re = 3 900

2021 ◽  
Vol 33 (3) ◽  
pp. 479-487
Author(s):  
Wei-wen Zhao ◽  
Chun-hui Ma ◽  
De-cheng Wan ◽  
Yi-qian Wang
Keyword(s):  
Circular Cylinder ◽  
Force Field ◽  
Field Model ◽  
Three Dimensional
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