Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 715-726 |
| Number of pages | 12 |
| Journal | Heat and Mass Transfer/Waerme- und Stoffuebertragung |
| Volume | 40 |
| Issue number | 9 |
| Publication status | Published - 2004 Jul |
| Externally published | Yes |
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ASJC Scopus subject areas
- Mechanics of Materials
- Computational Mechanics
- Physical and Theoretical Chemistry
- Fluid Flow and Transfer Processes
Cite this
Dynamics of Brownian particles in a turbulent channel flow. / Fukagata, Koji; Zahrai, S.; Bark, F. H.
In: Heat and Mass Transfer/Waerme- und Stoffuebertragung, Vol. 40, No. 9, 07.2004, p. 715-726.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Dynamics of Brownian particles in a turbulent channel flow
AU - Fukagata, Koji
AU - Zahrai, S.
AU - Bark, F. H.
PY - 2004/7
Y1 - 2004/7
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=4243156279&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=4243156279&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:4243156279
VL - 40
SP - 715
EP - 726
JO - Heat and Mass Transfer
JF - Heat and Mass Transfer
SN - 0947-7411
IS - 9
ER -