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http://dx.doi.org/10.3795/KSME-B.2004.28.7.809

Numerical Study of Flow Around Impulsively Started Elliptic Cylinder Using Vortex Particle Method  

Lee, Sang-Hwan (한양대학교 기계공학부)
Joo, Nam-Soo (한양대학교 대학원 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.28, no.7, 2004 , pp. 809-817 More about this Journal
Abstract
In this paper, the unsteady behavior of the viscous flow field past an impulsively started elliptic cylinder is studied numerically. In order to analyze flow field, we introduce vortex particle method. The vorticity transport equation is solved by fractional step algorithm which splits into convection term and diffusion term. The convection term is calculated with Biot-Savart law, the no-through boundary condition is employed on solid boundaries. The diffusion term is modified based on the scheme of particle strength exchange. The particle redistributed scheme for general geometry is adapted. The flows around an elliptic cylinder are investigated for various attack angles at Reynolds number 200. The comparison between numerical results of present study and experimental data shows good agreements.
Keywords
Vortex Particle Method; Elliptic Cylinder; Vorticity Redistribution; Particle Strength Exchange; Vorticity Creation; Viscous Splitting Algorithm;
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