scholarly journals Feedback Control of Karman Vortex Shedding behind a Circular Cylinder by Velocity Excitation

2004 ◽  
Vol 7 ◽  
pp. 1125-1132 ◽  
Author(s):  
Shinji HIEJIMA ◽  
Tadashi WATANABE ◽  
Takashi NOMURA
Keyword(s):  
Feedback Control ◽  
Circular Cylinder ◽  
Vortex Shedding ◽  
Karman Vortex

721 Effects of Helical Strakes on Karman Vortex Shedding from a Circular Cylinder with Serrated Fin

2004 ◽  
Vol 2004 (0) ◽  
pp. _721-1_-_721-5_
Author(s):  
Hiromitsu HAMAKAWA ◽  
Tohru FUKANO ◽  
Masaki ANDO ◽  
Eiichi NISHIDA
Keyword(s):  
Circular Cylinder ◽  
Vortex Shedding ◽  
Helical Strakes ◽  
Karman Vortex

Feedback control of vortex shedding from a circular cylinder

1996 ◽  
Vol 20 (3) ◽  
pp. 218-224 ◽  
Author(s):  
X. Y. Huang
Keyword(s):  
Feedback Control ◽  
Circular Cylinder ◽  
Vortex Shedding

814 Effect of fin around a circular cylinder on Karman vortex shedding in cross flow

2007 ◽  
Vol 2007 (0) ◽  
pp. _814-1_-_814-4_
Author(s):  
Hiromitsu HAMAKAWA ◽  
Tomohiro KUDO ◽  
Eiichi NISHIDA ◽  
Tohru FUKANO
Keyword(s):  
Circular Cylinder ◽  
Vortex Shedding ◽  
Cross Flow ◽  
Karman Vortex

Viscous Flow Past a Circular Cylinder Below a Free Surface

2014 ◽  
Author(s):  
Benjamin Bouscasse ◽  
Andrea Colagrossi ◽  
Salvatore Marrone ◽  
Antonio Souto-Iglesias
Keyword(s):  
Free Surface ◽  
Circular Cylinder ◽  
Vortex Shedding ◽  
Mixing Processes ◽  
Surface Evolution ◽  
Flow Past ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Karman Vortex ◽  
Drag And Lift

Flow past a circular cylinder close to a free surface at low Reynolds and large Froude numbers is investigated numerically using the Smoothed Particle Hydrodynamics model. This meshless method allows for a non-diffusive computation of the free surface evolution, even while breaking and fragmentation may occur. The distance of the cylinder to the free surface, submergence, is varied in order to investigate the detached flow patterns dependence with this factor. Vorticity shed by the cylinder, vortex generation due to free surface breaking, mixing processes, and drag and lift coefficients behavior are discussed. It has been found that, for small submergences, the classical Von Karman vortex shedding from the cylinder does not take place. In turn, moderate vortex shedding occurs, departing not from the cylinder but from vorticity generated at the free surface. This shedding takes places simultaneously with the transport of free surface fluid elements into the bulk of the fluid. It has been also found that for even smaller depth ratios, a vorticity layer remains spatially localized between the cylinder and the free surface, and a stagnation recirculating area develops behind the cylinder. Results are compared with literature finding reasonable qualitatively agreement with experimental works conducted with similar geometrical configuration but larger Reynolds number.

Circular cylinder response to Karman vortex shedding

1988 ◽  
Vol 25 (9) ◽  
pp. 769-775 ◽  
Author(s):  
L. E. Ericsson
Keyword(s):  
Circular Cylinder ◽  
Vortex Shedding ◽  
Karman Vortex

Synchronized Vibrations of a Circular Cylinder in Cross Flow at Supercritical Reynolds Numbers1

2003 ◽  
Vol 125 (1) ◽  
pp. 97-108 ◽  
Author(s):  
Tsutomu Kawamura ◽  
Toshitsugu Nakao ◽  
Masanori Takahashi ◽  
Masaaki Hayashi ◽  
Kouichi Murayama ◽  
...  
Keyword(s):  
Circular Cylinder ◽  
Strouhal Number ◽  
Vortex Shedding ◽  
Cross Flow ◽  
Reynolds Numbers ◽  
Excited Vibration ◽  
Karman Vortex ◽  
Lock In

Synchronized vibrations of a circular cylinder in a water cross flow at supercritical Reynolds numbers were measured. Turbulence intensities were varied to investigate the effect of the Strouhal number on the synchronization range. Self-excited vibration in the drag direction due to symmetrical vortex shedding began only when the Strouhal number was about 0.29, at a reduced velocity of 1.1. The reduced velocities at the beginning of lock-in vibrations caused by Karman vortex shedding decreased from 1.5 to 1.1 in the drag direction and from 2.7 to 2.2 in the lift direction, as the Strouhal number increased from 0.29 to 0.48.

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