Dynamics of Brownian particles in a turbulent channel flow

K. Fukagata, S. Zahrai, F. H. Bark

研究成果: Article査読

14 被引用数 (Scopus)

抄録

Turbulent channel flows with suspended particles are investigated by means of numerical simulations. The fluid velocity is computed by large eddy simulation. Motion of small graphite particles with diameter of 0.01-10 μm, corresponding to the Schmidt number, Sc, of 2.87 × 102-6.22 × 106 and the particle relaxation time in wall unit, τp+, of 9.79 × 10-5-4.51, is computed by Lagrangian particle tracking. Relation between the particle relaxation time and the computed deposition velocity is found to be in good agreement with an empirical relation. The statistics of the particle motion in the vicinity of the wall are studied. Clear differences are found in dynamical behavior of particles with different sizes. Medium size particles show a strong dependence on the structure of the fluid flow, while small and large particles are considerably less sensitive.

本文言語English
ページ(範囲)715-726
ページ数12
ジャーナルHeat and Mass Transfer/Waerme- und Stoffuebertragung
40
9
DOI
出版ステータスPublished - 2004 7月
外部発表はい

ASJC Scopus subject areas

  • 凝縮系物理学
  • 流体および伝熱

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