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Numerical simulation of the flow behind a circular cylinder with a rotary oscillation
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 Title & Authors
Numerical simulation of the flow behind a circular cylinder with a rotary oscillation
Baek, Seung-Jin; Seong, Hyeong-Jin;
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 Abstract
A numerical study was made of flow behind a circular cylinder in a uniform flow, where the cylinder was rotationally oscillated in time. The temporal behavior of vortex formation was scrutinized over broad ranges of the two externally specified parameters, i.e., the dimensionless rotary oscillating frequency (.110.leq. .leq..220) and the maximum angular amplitude of rotation (.theta.=15 deg., 30 deg. and 60 deg.). The Reynolds number (Re= .nu.) was fixed at Re=110. A fractional-step method was utilized to solve the Navier-Stokes equations with a generalized coordinate system. The main emphasis was placed on the initial vortex formations by varying and .theta.. Instantaneous streamlines and pressure distributions were displayed to show the vortex formation patterns. The vortex formation modes and relevant phase changes were characterized by measuring the lift coefficient ( ) and the time of negative maximum ( ) with variable forcing conditions.s.tions.s.s.s.
 Keywords
Circular Cylinder Wake;Rotary Oscillation;Vortex Shedding;Life Force;
 Language
Korean
 Cited by
1.
주기적으로 회전하는 원형실린더 주위의 유동특성,최해천;최성호;강상모;

대한기계학회논문집B, 2002. vol.26. 4, pp.515-523 crossref(new window)
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