Fluid Mechanics & Aerodynamics

Fluid Mechanics & Aerodynamics

Numerical study of deposition of Aerosol particles of sulfur dioxide and water in the flow inside the channel in the presence of two circular obstacles using the lattice Boltzmann method

Articles in Press

Document Type : Original Article

Authors
Ahmad Reza Rahmati 1
babak roshani 2
1 Associate Professor, Department of Mechanical Engineering, University of Kashan, Kashan, Iran
2 PhD Student, Department of Mechanical Engineering, University of Kashan, Kashan, Iran
Abstract
In the present study, the deposition of airborne sulfur dioxide and water particles in a channel flow with two consecutive circular obstacles was numerically investigated using the lattice Boltzmann method. The main objective was to examine the variation in the number of deposited particles under one- and two-obstacle conditions for two different particle types at various Reynolds numbers. The numerical simulation was performed using the Lattice Boltzmann D2Q9 model implemented in C++. The released particles in the channel were water and SO₂ with diameters of 100 nm, 1 μm, and 10 μm. Reynolds numbers ranged from 50 to 800. The results showed that particle type, particle size, Reynolds number, and the number of obstacles significantly influenced the deposition process. For Reynolds numbers higher than 200, the number of deposited particles on the obstacles was nearly the same. At Reynolds number 50, due to the heavier nature of SO₂ particles, only 3 particles were deposited on the obstacles, which was much fewer than the 17 deposited water particles under the same condition. This number remained unchanged for both one- and two-obstacle cases. At Reynolds number 200, the number of deposited particles on the obstacles in the two-obstacle case was almost twice that of the one-obstacle case.
Keywords
Keywords: lattice Boltzmann method
curved obstacle
Particle Tracking
Deposition Mechanism
Fluid Mechanics & Aerodynamics

Articles in Press, Accepted Manuscript
Available Online from 22 December 2025

  • Receive Date 05 October 2025
  • Revise Date 22 November 2025
  • Accept Date 09 December 2025
  • Publish Date 22 December 2025