Investigation of particle dispersion and deposition in a channel with elliptic obstructions using lattice Boltzmann method

Tehrani, A ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1109/NEMS.2012.6196830
  3. Publisher: 2012
  4. Abstract:
  5. Particle transport and deposition in a channel flow with elliptic obstruction is studied. Numerical simulation of fluid flow is performed using two-dimensional lattice Boltzmann method, while one-way coupling Lagrangian method for particle tracking is used. Standard particles are injected in the inlet of the channel. Gravity, Drag force, Brownian forces, and the Saffman lift are considered in equation of particle motion. The influence of geometrical parameter, ellipse aspect ratio, is studied on dispersion and deposition of particles as well as the flow parameters, such as Reynolds number. In addition, the effect of particles size -particles of 0.01-10μm in diameter- on dispersion and deposition patterns is studied. Results reveal more inertial and gravitational trapping on obstacle surface for particles of larger diameter and obstacles of higher aspect ratio. In addition, the Brownian diffusion and the vortexes formed behind the obstacle, which occurs in high Reynolds numbers, dominantly affect finer particles trajectories
  6. Keywords:
  7. One-way coupling Lagrangian particle tracking ; Brownian diffusion ; Brownian forces ; Deposition patterns ; Drag forces ; Finer particles ; Flow parameters ; Geometrical parameters ; High Reynolds number ; Lagrangian particle tracking ; Lattice Boltzmann method ; One-way coupling Lagrangian method ; Particle dispersion ; Particle motions ; Particle tracking ; Particle transport ; Particles sizes ; Two-dimensional Lattice Boltzmann method ; Aspect ratio ; Brownian movement ; Particles (particulate matter) ; Reynolds number ; Dispersions
  8. Source: 2012 7th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2012, 5 March 2012 through 8 March 2012 ; March , 2012 , Pages 523-528 ; 9781467311243 (ISBN)
  9. URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6196830