NDLI: Analysis of solid particle clusters in coherent structures of turbulent channel flow

Content Provider	Springer Nature Link
Author	Lu, Hao Wang, Bing Zhang, HuiQiang Qin, JianXiu Wang, XiLin
Copyright Year	2013
Abstract	A particle-laden turbulent channel flow is investigated to study particle clusters in large-scale turbulent coherent structures. The fluid phase is calculated by large eddy simulation and particles are tracked using Lagrangian trajectory method. The flow Reynolds number is 180 based on the friction velocity and half-width of the channel. The particle is lycopodium with St=0.93 which may well follow the fluid phase. The mean and fluctuating velocities of both two phases are obtained, which are in good agreement with previous data. The strongest accumulations of particles in low-speed streak structures are observed at y $^{+}$=11.3. Moreover, once particles are captured in low-speed streaks, most of them will reside there for a long period. Particles clustered in low-speed streaks obtain smaller instantaneous wall-normal and spanwise velocities than those out of there, which induce a larger particle flux into low-speed streaks than that out of there. The study is important for understanding particle dispersion mechanisms in gas-particle turbulent channel flows.
Starting Page	2525
Ending Page	2530
Page Count	6
File Format	PDF
ISSN	16747321
Journal	Science in China Series E: Technological Sciences
Volume Number	56
Issue Number	10
e-ISSN	18691900
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-09-09
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	particle cluster preferential concentration low-speed streak coherent structure large eddy simulation Lagrangion trajectory method Engineering
Content Type	Text
Resource Type	Article
Subject	Engineering Materials Science

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