Numerical study of aerosol particles collection by falling drops

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To model the capture of aerosols by an isolated drop falling at terminal velocity, an Eulerian approach to simulate both
internal and external flows (gas phase: air surrounding the drop, liquid phase: water of the drop) is coupled to a Lagrangian
approach to simulate the transport of the dispersed phase (aerosol). The flows are simulated with Direct Numerical
Simulation (DNS), by numerically solving the incompressible Navier-Stokes equations. The dynamics of the liquid/gas
interface is modeled using both Volume of Fluid (VOF) and Level Set methods (Vaudor et al. 2017). The aerosol transport
is simulated by applying Newton's second law to calculate their trajectories, considering drag force and Brownian motion.
We show that this approach gives results similar to that of the literature where no interface dynamics are employed. This
suggests that present methodology can be used to build collection efficiency database in the case of oscillating droplets at
larger Reynolds number.

Technical datasheet
- Year of publication
  
  2023
- Language
  
  Fran ais
- Discipline(s)
  
  Ingénierie des procédés
- Author(s)
  
  REYES E., M NARD T., R VEILLON J., LEMAITRE P., BELUT E.
- Reference
  
  Acte de congr s CFA 2023, 15 16 mars 2023,10.25576/ASFERA-CFA2023-32900, p 58