Improved numerical simulation of aerosol deposition in an idealized mouth–throat

The deposition of monodisperse particles (1.0–26.0 μm diameter) in an idealized mouth–throat geometry has been studied numerically. The continuous phase flow is solved using a RANS (Reynolds averaged Navier–Stokes) turbulence model at inhalation flow rates of 90.0 and 30.0 l/min. The particulate phase is simulated using a random-walk/Lagrangian stochastic eddy-interaction model (EIM). Without near-wall corrections in the EIM, poor agreement is seen with experimental data on deposition. However, when a new near-wall correction in the EIM is implemented, the particle deposition results in the idealized mouth–throat geometry are in relatively good agreement when compared with measured data obtained in separate experiments.