Effect of cross-confinement on unsteady wake characteristics of circular cylinder immersed in shear flow

2021 ◽  
Vol 21 (4) ◽  
pp. 195
Author(s):  
Prashant Kumar ◽  
Shaligram Tiwari
Keyword(s):  
Circular Cylinder ◽  
Shear Flow ◽  
Unsteady Wake ◽  
Wake Characteristics

Vortex shedding from a circular cylinder in moderate-Reynolds-number shear flow

1980 ◽  
Vol 101 (4) ◽  
pp. 721-735 ◽  
Author(s):  
Masaru Kiya ◽  
Hisataka Tamura ◽  
Mikio Arie
Keyword(s):  
Reynolds Number ◽  
Circular Cylinder ◽  
Shear Flow ◽  
Vortex Shedding ◽  
Transverse Velocity ◽  
Number Range ◽  
Uniform Shear ◽  
Reynolds Number Range ◽  
Moderate Reynolds Number ◽  
Shear Parameter

The frequency of vortex shedding from a circular cylinder in a uniform shear flow and the flow patterns around it were experimentally investigated. The Reynolds number Re, which was defined in terms of the cylinder diameter and the approaching velocity at its centre, ranged from 35 to 1500. The shear parameter, which is the transverse velocity gradient of the shear flow non-dimensionalized by the above two quantities, was varied from 0 to 0·25. The critical Reynolds number beyond which vortex shedding from the cylinder occurred was found to be higher than that for a uniform stream and increased approximately linearly with increasing shear parameter when it was larger than about 0·06. In the Reynolds-number range 43 < Re < 220, the vortex shedding disappeared for sufficiently large shear parameters. Moreover, in the Reynolds-number range 100 < Re < 1000, the Strouhal number increased as the shear parameter increased beyond about 0·1.

Unsteady Wake Characteristics of a Flapping Wing through 3D TR-PIV

2012 ◽  
Vol 25 (4) ◽  
pp. 547-558 ◽  
Author(s):  
Saurav Kumar Ghosh ◽  
Chandrala Lakshmana Dora ◽  
Debopam Das
Keyword(s):  
Flapping Wing ◽  
Unsteady Wake ◽  
Wake Characteristics
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