Numerical Study of Aerosol Deposition Behavior in a Simplified Human Upper Airway Model

Onderzoeksoutput: Conference paper

Samenvatting

Aerosol deposition behavior during inspiratory breathing phase of respiration is studied numerically for a simplified human upper airway model (UAM). The numerical simulation is based on an Euler-Lagrange methodology. The Eulerian phase is simulated by using Reynolds Averaged Navier- Stokes equation (RANS) with the low Reynolds SST k-omega turbulence model. The aerosols are tracked in the Lagrangian frame by using the eddy interaction model (EIM). The simulation is performed consisting of mono-disperse particle of sizes 2, 3, 4, 6, 8 and 10 micrometers at breathing rates of 30 and 60 L/min. The aim of the is oriented at: (a) demonstrating the accuracy of newly proposed "helicity EIM" previously described in V.Agnihotri et al. (2012) over classical EIM assuming isotropy ("isotropic EIM"), (b) investigating the effect of inlet boundary condition on aerosol deposition behavior. The results are validated against the experimental data available on the present UAM by comparing the total and compartmental relative deposition efficiencies. It is shown that the "helicity EIM" is not only accurate in predicting total deposition efficiencies but also able to capture the aerosol deposition pattern.
Originele taal-2English
Titel9th National Congress on Theoretical and Applied Mechanics, Brussels, 2012
StatusPublished - 9 mei 2012
Evenement9th National Congress on Theoretical and Applied Mechanics - RMA, Brussels, Belgium
Duur: 9 mei 201211 mei 2012

Conference

Conference9th National Congress on Theoretical and Applied Mechanics
Verkorte titelNCTAM 2012
Land/RegioBelgium
StadBrussels
Periode9/05/1211/05/12

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