대한조선학회논문집 (Journal of the Society of Naval Architects of Korea)

  • 제40권2호
  • /
  • Pages.21-27
  • /
  • 2003
  • /
  • 1225-1143(pISSN)
  • /
  • 2287-7355(eISSN)
대한조선학회 (The Society of Naval Architects of Korea)
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진동하는 원형주상체 주위의 와류 수치 모사

Numerical Simulation of the Vortical flow around an Oscillating Circular Cylinder

  • 김광수 (서울대학교 조선해양공학과) ;
  • 이승재 (서울대학교 조선해양공학과) ;
  • 서정천 (서울대학교 조선해양공학과/해양시스템공학연구소)
  • 발행 : 2003.04.01
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초록

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.

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참고문헌

  1. 김광수, 서정천, 1998, '와도를 기저로 한 초기 순간 출발하는 실린더 주위의 점성유동해석,' 대한조선학회 논문집, 제35권 4호, 1998
  2. 김광수, 1998, '와도를 기저로 한 2차원 날개 주위의 점성유동해석,' 서울대학교 조선해양공학과 석사학위논문, 1998
  3. 서정천, 1998, '와도를 기저로 한 비압축성 점성유동해석 방법', 한국전산유체공학회지, 제3권 제1호, pp. 11-21.
  4. Dutsch, H., Durst, F., Becker, F. and Lienhart, F., 1998, 'Low Reynolds number flow around an oscillating circular cylinder at low Keulegan Carpenter numbers,' J. of Fluid Mechanics, vol. 360, pp. 249-271 https://doi.org/10.1017/S002211209800860X
  5. Justesen, P., 1991 , 'A numerical study of oscillating flow around a circular cylinder, ' J. of Fluid Mechanics, vol. 222, pp. 157-196 https://doi.org/10.1017/S0022112091001040
  6. Suh, J.-C. and Kim, K.-S., 1999, 'A vorticity-velocity formulation for solving the two-dimensional Navier-Stokes equations', Fluid Dynamics Research, Vol. 25, No. 4, pp. 195-216. https://doi.org/10.1016/S0169-5983(99)00020-9
  7. Sumer, B.M. and Fredsoe, J., 1997, Hydrodynamics around cylindrical structures, World Scientific Publishing
  8. Tatsuno, M. and Bearman, P. W., 1990, 'A visual study of the flow around an oscillating circular cylinder at low Keulegan-Carpenter numbers and low Stokes numbers,' J. of Fluid Mechanics, vol.211, pp. 157-182 https://doi.org/10.1017/S0022112090001537
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피인용 문헌

  1. Flow Control and Drag Reduction of a Circular Cylinder by an External Magnetic Field vol.41, pp.2, 2004, https://doi.org/10.3744/SNAK.2004.41.2.070