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http://dx.doi.org/10.3795/KSME-B.2004.28.7.771

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

Cho, Ji-Young (한양대학교 대학원 기계공학과)
Lee, Sang-Hwan (한양대학교 기계공학부)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.28, no.7, 2004 , pp. 771-779 More about this Journal
Abstract
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.
Keywords
Vortex Particle Method; Hybrid Diffusion Scheme; Semicircular Cylinder; Particle Strength Exchange; Random Walk; Vortex Shedding Process;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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