진동하는 원형주상체 주위의 와류 수치 모사

• Published in: 大韓造船學會 論文集 Vol. 40; no. 2; pp. 21 - 27
• Main Authors: 김광수(Kwang Soo Kim), 이승재(Seung Jae Lee), 서정천(Jung-Chun Suh)
• Format: Journal Article
• Language: Korean
• Published: 대한조선학회 2003
• Subjects: Reynolds number(레이놀즈수); vortex(보텍스); Fourier transform(푸리에변환); drag force(항력); Keulegan-Carpenter number(크리건-카핀턴수); lift force(양력); -
• ISSN: 1225-1143; 2287-7355

The phenomena of vortex shedding around a cylinder oscillating harmonically in a fluid at rest are investigated by a two-dimensional numerical simulation of the Navier-Stokes equations. The simulation is based on a vorticity-velocity integro-differential formulation dealing with vorticity, velocity and pressure variables. Three combinations of Reynolds number(Re) and Keulegan-Carpenter number(KC) were taken to investigate the associated vortex development around the cylinder in the different flow regimes. Drag and lift forces are computed to describe their dominant frequency modulation which is related to the vortex shedding and to the harmonic motion of the cylinder.