Simulation of filtration in shaped fiber media

A model for filtration of aerosol particles based on the Stokes equations for air velocity and pressure and the Langevin equation for particle paths is presented. The simulation is developed for a filter media consisting of fibers of various shapes and sizes, and validated through comparison to theoretical results for round fibers. When the simulation is applied to filters composed of capillary-channel polymer (C-CP) fibers and filters composed of round fibers having the same cross-sectional area as the C-CP fibers, single-fiber efficiency and figure of merit results indicate that filters made from C-CP fibers have a performance advantage over round fiber filters.