Deposition and dispersion of aerosols over triangular cylinders in a two-dimensional channel; effect of cylinder location and arrangement

• Published in: Journal of molecular liquids 2015-06, Vol.206, p.228-238
• Main Authors: Ghafouri, S., Alizadeh, M., Seyyedi, S.M., Hassanzadeh Afrouzi, H., Ganji, D.D.
• Format: Article
• Language: English
• Subjects: Lattice Boltzmann method; Particle dispersion; Sedimentation; Triangular cylinder
• ISSN: 0167-7322; 1873-3166
• DOI: 10.1016/j.molliq.2015.02.018

The deposition and dispersion of particles with diameters in the range of 0.45μm to 55μm in a channel over a triangle obstacle are studied. The lattice Boltzmann method (LBM) is used to obtain the fluid velocity in a two-dimensional channel at Reynolds number of 200. The effect of position and arrangement of triangular cylinders on the deposition and distribution of particles and relative profiles and physical parameters is studied. To obtain the particle location and velocity the Lagrangian method is used. All affected forces in particle motion such as Brownian, gravity, drag and lift forces are considered in this investigation. The results are shown in terms of instantaneous plot of particle location and the profiles of deposition efficiency over the upstream and downstream cylinders. Decreasing the gap ratio restricts the movement of particles toward the region between the two cylinders except for Stk=0.001. [Display omitted] •In this paper, deposition and dispersion of particles with diameters in the range of 0.45μm to 55μm in a channel over triangle obstacle is investigated.•Increase of Stokes number increases the number of particles which sediment on the surface of the obstacle and channel’s walls.•Decreasing the gap ratio restricts the movement of particles toward the region between the two cylinders except for Stk=0.001.