A growing body of experimental evidence suggests that the deposition behavior of microbial particles (e.g., bacteria and viruses) is inconsistent with the classical colloid filtration theory (CFT). Well-controlled laboratory-scale column deposition experiments were conducted with uniform model particles and collectors to obtain insight into the mechanisms that give rise to the diverging deposit...

We study the influence of particle shape on growth processes at the edges of evaporating drops. Aqueous suspensions of colloidal particles evaporate on glass slides, and convective flows during evaporation carry particles from drop center to drop edge, where they accumulate. The resulting particle deposits grow inhomogeneously from the edge in two dimensions, and the deposition front, or growth...

In most patients, the deposition of aerosolized pentamidine (AP) is less in the apex of the lung relative to the base. As the apex of the lung is relatively less ventilated than the base, it is possible that reduced regional ventilation may explain the inhomogeneity in regional drug deposition. The purpose of this study was to measure the relationship between regional deposition of AP and regio...

The effect of vapor-wall deposition on secondary organic aerosol (SOA) formation has gained significant attention; however, uncertainties in experimentally derived SOA mass yields due to uncertainties in particle-wall deposition remain. Different approaches have been used to correct for particle-wall deposition in SOA formation studies, each having its own set of assumptions in determining the ...

A new model is presented to describe particle deposition in 90◦ bends of exhaust ventilation systems. This model accounts for nonStokes particle motion and for variable deposition patterns as a function of particle Stokes number. Estimates made with the new model and with two models previously published were compared to measurements of deposition in bends with geometries, particle characteristi...

Particle deposition on a square cylinder placed in a rectangular channel was investigated for unsteady vortical  ows. For the two-phase  ow simulations, the unsteady gas  ow Ž eld was computed by solving the incompressible Navier-Stokes equations using a staggered-grid control volume approach and the Marker-andCell (MAC) technique. The particle dynamics were simulated using themodiŽ edBasset...

BACKGROUND The human respiratory airway undergoes dramatic growth during infancy and childhood, which induces substantial variability in air flow pattern and particle deposition. However, deposition studies have typically focused on adult subjects, the results of which cannot be readily extrapolated to children. We developed models to quantify the growth of human nasal-laryngeal airways at earl...