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http://dx.doi.org/10.5139/JKSAS.2003.31.3.008

Numerical Analysis of the Particle Dispersion by the Variation of the Velocity Ratio in a Mixing Layer  

Seo, Tae Won (안동대학교)
Kim, Tae Jin (포항산업과학연구원)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.31, no.3, 2003 , pp. 8-14 More about this Journal
Abstract
The particle dispersion in the turbulent mixing layer has been numerically investigated to clarify the effect of the velocity ratio in the large-scale vortical structures. In this study the LES with subgrid-scale model is employed. The Lagrangian method to predict the particle motion is applied. The particles of 10, 50, 150, 200${\mu}m$ in mean diameter were loaded into the origin of the mixing layer. It is shown that the characteristics of flow and growth rate are strongly dependent on the variation of the velocity ratio. It is also shown the relationship between the Stokes number and the particle dispersion. As a result, in the case of St~1 the particle dispersion is faster than the diffustion of the flow field while in the cases of both St<<1 and St>>1 it is shown that the particle dispersion in lower than the diffusion of the flow filed.
Keywords
Particle dispersion; Large-eddy simulation; Mixing layer; Large-scale vortical structure;
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