Collection of Nanoaerosols by Filters Composed of Nanofibers

The collection of aerosol nanoparticles by filters composed of nanofibers has been theoretically investigated. The convective diffusion deposition of point particles from a Stokes flow in model filters with an ordered structure has been calculated taking into account the effect of gas slip at the fibers. It has been shown that, at small Peclet numbers ( ), the efficiency of diffusion collection of particles by a fiber does not depend on the Knudsen number ( ), while, at large Peclet numbers ( ⪢ 1), it varies from at = 0 to at The applicability regions have been determined for the equations used to calculate nanoaerosol collection efficiency. The calculation results have been employed to derive approximation formulas for the collection efficiency within ranges of = 0.1−1000 and