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http://dx.doi.org/10.3744/SNAK.2006.43.3.322

Immersed Boundary Method for Flow Induced by Transverse Oscillation of a Circular Cylinder in a Free-Stream  

Kim, Jeong-Hu (Department of Naval Architecture and , Ocean Engineering, Pusan National University)
Yoon, Hyun-Sik (Advanced Ship Engineering Research Center, Pusan National University)
Tuan H.A. (Department of Naval Architecture and, Ocean Engineering, Pusan National University)
Chun, Ho-Hwan (Department of Naval Architecture and , Ocean Engineering, Pusan National University)
Publication Information
Journal of the Society of Naval Architects of Korea / v.43, no.3, 2006 , pp. 322-330 More about this Journal
Abstract
Numerical calculations are carried out for flow past a circular cylinder forced oscillating normal to the free-stream flow at a fixed Reynolds number equal to 185. The cylinder oscillation frequency ranged from 0.8 to 1.2 of the natural vortex-shedding frequency, and the oscillation amplitude extended up to 20% of the cylinder diameter. IBM (Immersed Boundary Method) with direct momentum forcing was adopted to handle both of a stationary and an oscillating cylinder Present results such as time histories of drag and lift coefficients for both stationary and oscillating cases are in good agreement with previous numerical and experimental results. The instantaneous wake patterns of oscillating cylinder with different oscillating frequency ratios showed the synchronized wakes pattern in the lock-in region and vortex switching phenomenon at higher frequency ratio than the critical frequency ratio.
Keywords
Immersed-boundary method(IBM); Moving body; Lock-in region; Phase switch;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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