Theoretical analysis of the motion and evaporation of exhaled respiratory droplets of mixed composition

D. Parienta, L. Morawska, G. R. Johnson, Z. D. Ristovski, M. Hargreaves, K. Mengersen, S. Corbett, C. Y.H. Chao, Y. Li, D. Katoshevski

Research output: Contribution to journalArticlepeer-review

53 Scopus citations

Abstract

The dynamics of droplets exhaled from the respiratory system during coughing or talking is addressed. A mathematical model is presented accounting for the motion of a droplet in conjunction with its evaporation. Droplet evaporation and motion are accounted for under two scenarios: (1) a well mixed droplet and (2) a droplet with inner composition variation. A multiple shells model was implemented to account for internal mass and heat transfer and for concentration and temperature gradients inside the droplet. The trajectories of the droplets are computed for a range of conditions and the spatial distribution and residence times of such droplets are evaluated.

Original languageEnglish
Pages (from-to)1-10
Number of pages10
JournalJournal of Aerosol Science
Volume42
Issue number1
DOIs
StatePublished - 1 Jan 2011

Keywords

  • Droplet dynamics
  • Modeling
  • Spray/aerosol

ASJC Scopus subject areas

  • Environmental Engineering
  • Pollution
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes
  • Atmospheric Science

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