||Sieving of aerosol particles with metal screens
Kawara, Naoki Kumita, Mikio ,
Kurachi, Hisashi Seto, Takafumi ,
Kamba, Seiji ,
Kondo, TakashiOtani, Yoshio
Aerosol Science and Technology
541 , 2016-06-02 , Taylor and Francis Inc.
Metal screens with uniform micrometer-sized opening were employed to sieve aerosol particles by suppressing the adhesion of particles smaller than the openings. The collection efficiencies of monodispersed polystyrene latex (PSL) particles were experimentally determined using the metal screens with 1.2, 1.8, 2.5, and 4.2 μm openings at various filtration velocities. The particles smaller than the mesh opening adhered on the metal screen at a low filtration velocity, but the bounce-off of particles on the mesh surface suppressed the adhesion at a high velocity. As a result, we found that the adhesion of PSL particles larger than 0.3 μm mostly suppressed at a filtration velocity higher than 10 m s−1 and therefore we can sieve aerosol particles according to the opening size of metal screens. We also found that the particle number concentration could be determined by measuring the increase in pressure drop since the clogging of metal screen openings takes place by the individual particles. © 2016 American Association for Aerosol Research © 2016 American Association for Aerosol Research.