대한기계학회논문집B (Transactions of the Korean Society of Mechanical Engineers B)

  • 제28권7호
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  • Pages.771-779
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  • 2004
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  • 1226-4881(pISSN)
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  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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반원형실린더 초기후류를 위한 입자와법의 하이브리드 확산기법

Hybrid Diffusion Scheme of vortex Particle Method for Early Wake Past Semicircular Cylinder

  • 조지영 (한양대학교 대학원 기계공학과) ;
  • 이상환 (한양대학교 기계공학부)
  • 발행 : 2004.07.01
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초록

Unsteady behavior of the early wake in the viscous flow field past an impulsively started semicircular cylinder is studied numerically. In this paper, we propose the hybrid diffusion scheme to simulate dynamic characteristics of wake such as a fishtail-like flapping and an alternate vortex-shedding more accurately. This diffusion scheme based on particle strength exchange is mixed with the stochastic nature of random walk method. Also, the viscous splitting algorithm which calculates convective and diffusion terms successively is applied in order to handle random walk method effectively. Consequently, the early behavior of wake due to the breakdown of symmetrical vortici balance is more practically simulated with the vortex particle method.

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참고문헌

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