Capture of Particles on Spheres by Inertial and Electrical Forces

Effects of Electric Field Strength on an Antimicrobial Air Filter

“…5(c) and 5(f)), which matched the stage of virtually Deposit profile of natural product in antimicrobial filter unhindered dendrite growth. Previous studies (Nielsen and Hill, 1976;Auzerais et al, 1983;Park and Park, 2005) have demonstrated that particle dendrites form on fibers in a pattern that is parallel to the direction of the EF applied across the filter. Particle deposition at 0 kV/cm corresponded to the process of deposition on a clean fiber.…”

Charged Particle Collection by an Oppositely Charged Accelerating Droplet

“…Since the efficiency calculation requires extra computation time at small St where a small time step is necessary (Wang et al, 1984), it is impractical to calculate the efficiencies at far downstream points using numerical integration. Fortunately, a rather interesting characteristic was observed by Nielsen and Hill (1976) in that nearly parallel efficiency curves are obtained for small St and large -Kc, and the collision efficiency can be well represented by for -Kc/St > 3.33. Therefore, a semiempirical solution technique which consists of numerical integration and empirical fitting is developed in t h s study for efficiency calculation.…”

“…Inertial and electrostatic collection of particles by spheres has been extensively discussed in the literature (George and Poehlein, 1974;Nielsen and Hill, 1976;Beizaie and Tien, 1980;Wang et al, 1984). The literature results strongly suggest that the imposition of electrostatic forces on these spheres significantly improves their collection efficiencies.…”

Charged Fog Technology Part I: Theoretical Background and Instrumentation Development

“…20 " 24 When an aerosol particle approaches a water droplet with a relative velocity, it may directly collide with the droplet (impaction), barely touch the droplet (interception), or entirely miss the droplet. The relative effect of the mechanisms of interaction between the droplet and the particle depends upon the size of the particle.…”