74th Annual Meeting of the APS Division of Fluid Dynamics (November 21, 2021 — November 23, 2021)

V0026: Lagrangian analysis of saliva particle transport during normal breathing

  • Wayne Oaks, Stony Brook University
  • Kevin Flora, Stony Brook University
  • Christian Santoni, Stony Brook University
  • Zexia Zhang, Stony Brook University
  • Fotis Sotiropoulos, Virginia Commonwealth University
  • Ali Khosronejad, Stony Brook University
DOI: https://doi.org/10.1103/APS.DFD.2021.GFM.V0026

Normal human breathing is simulated to capture details of saliva particle transport with and without a face mask. The simulations are carried out using more than 600 CPU's for 6 months. The breathing is modeled using high-resolution large-eddy simulations coupled with a novel Lagrangian particle tracking approach. Our simulations revealed that with a non-medical face mask, saliva particles stay within a roughly 1.6 ft region in front of the person. While, without a face mask and in about 1.2 minutes, the pathogen-carrying saliva particles can spread as far as 9 ft away from the person.

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