A study of low pressure particle impaction processes

Neutralization of Bacterial Aerosols by Aerodynamic Shocks in a Novel Impactor System: An Integrated Computational and Experimental Study

“…Therefore, the study will focus on the centerline properties of the complex flow field that develops in the experimental impactor of Correspondingly the static temperature and pressure decrease as the gas expands. In is similar to the ones observed in experimental shadowgraphs and wave diagrams in the literature [2,29].…”

“…The generated impinging flow on a plate from a converging nozzle operating under sonic conditions results in the creation of a standoff shock whose properties can be changed by varying impactor geometry (distance between nozzle and plate x and diameter of nozzle d) and operating conditions [2,13,14,29,42,51]. In traditional impactors [21,22], the aerosol is collected by impaction on a flat surface.…”

“…Subsequently, three grid adaptation steps are applied to refine the mesh in areas with high pressure gradients, specifically in the area between the nozzle exit and the deceleration tube inlet. Li et al [34,37,35,36] Theoretical and experimental observations indicate the presence of instabilities in the flow structure of the impinging jets in the presence of an impaction plate [2,29,42].…”

Bacterial aerosol neutralization by aerodynamic shocks using an impactor system: Experimental results for E. coli and analysis

“…The generated impinging flow on a plate from a converging nozzle operating under sonic conditions results in the creation of a standoff shock whose properties can be changed by varying impactor geometry (distance between nozzle and plate x and diameter of nozzle d) and operating conditions (Alvi et al, 2002;Delamora et al, 1990aDelamora et al, , 1990bJurcik et al, 1989;Powell, 1988;Sislian et al, 2009). In traditional impactors (Hering et al, 1978(Hering et al, , 1979, the aerosol is collected by impaction on a flat surface.…”

Particle Impaction on a Supersonic Cone

“…The technology of supersonic jets has applications in such diverse fields as low pressure impactors (Fernandez de la Mora et a]., 1990; Biswas and Flagan, 1984;Jurcik et a]., 1989), thin film formation (Fukushima et al, 1985) and fine line pattern formation (Chen et a]., 1987). if the particle Stokes number was rescaled with the shock detachment distance.…”