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 vorticity balance is more practically simulated With the vortex particle methodbr/
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More From: Transactions of the Korean Society of Mechanical Engineers B
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