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http://dx.doi.org/10.3795/KSME-B.2004.28.1.089

Particle Dispersion and Effect of Spin in the Turbulent Boundary Layer Flow  

Kim, Byung-Gu (연세대학교 대학원)
Lee, Chang-Hoon (연세대학교 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.28, no.1, 2004 , pp. 89-98 More about this Journal
Abstract
In this paper, we develope a dispersion model based on the Generalized Langevin Model. Thomson's well-mixed condition is the well known criterion to determine particle dispersion. But, it has 'non-uniqueness problem'. To resolve this, we adopt a turbulent model which is a new approach in this field of study. Our model was greatly simplified under the self-similarity condition, leaving model only two model constants $C_{0}$ and ${\gamma}$$_{5}$ that control the dispersion and spin which measures rotational property of the Lagrangian particle trajectory. We investigated the sign of spin as well as magnitude by using the Direct Numerical Simulation. Model calculations were performed on the neutrally stable boundary layer flow. We found that spin has weak effect on the particle dispersion but it shows the significant effect on the horizontal flux compared to the zero-spin model.
Keywords
Lagrangian Stochastic Model; Turbulent Dispersion; Spin; Generalized Langevin Model;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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