Penetration of nanoparticles through screen-type diffusion batteries

Diffusion deposition of aerosol nanoparticles in model granular filters

“…This result is quite expected. The geometrical limit of the diffusion collection efficiency for a row of parallel cylinders was revealed in [13], substantiated in [14], and repeatedly con firmed in experiments with screen type diffusion batteries [15].…”

“…There with, the deposition onto the second and subsequent layers remains almost unchanged. Note that mutually spaced monolayers of granules (spheres) may be used as diffusion batteries in the diffusion method for deter mining the average sizes of nanoparticles [15]. 4 14.…”

Diffusion deposition of submicron aerosol particles in screen filters

“…1). The value calculated by formula (15) appeared to be equal to τϕ = 1.58, from which it was obtained ϕ = 1.377. Note that the average drag force in the screens turned out to be close to the aver age drag force in the double hexagonal model [2], which is equal to F 0 = 4π(-0.5lnα -0.46 + 2α 2 ) -1 , from where, for α = 0.22, we find k = 0.394, which almost coincides with the experimental value of k for these screens.…”

“…For isolated rows, the analytically found correction for slip transforms for mula (15) in the following way:…”

“…When very fine particles with large D values are deposited onto thin fibers at low velocities U and Pe < 1, the higher the packing density, the larger the Pe values at which a deviation from Eq. (2) takes place [15]. The deposition of nanoparticles at Pe < 1 has been consid ered in [16].…”