10th International Aerosol Conference September 2 - September 7, 2018 America's Center Convention Complex St. Louis, Missouri, USA
Abstract View
3-D Numerical Study of Linear Slot Virtual Impactor
WONYOUNG JEON, Hyunwoo Lee, Youngjin Seo, Kumoh National Institute of Technology
Abstract Number: 1073 Working Group: Aerosol Modeling
Abstract Virtual Impactor (VI) is used to classify particles into two sizes or to concentrate them to increase the concentration of particles. The basic principle of VI is to take advantage of the inertia that particles get through the accelerating nozzle. The most important point when designing a VI is to minimize the loss of particles (deposition due to collisions with walls). Losses at the wall has an adverse effect on VI performance. This study focuses on developing and optimizing the VI that operates at the flow-rate of 150 LPM. Target cut-point is 1 micrometer. The research is conducted for three steps. First, we numerically optimize the 2-D LSVI (Linear Slot Virtual Impactor). Second, we characterize 3-D geometry by simulating 3-D LSVI by selecting several revamped 2-D models. The particle simulation for the 3-D LSVI will be carried out at particle diameters in the size range of 0.1 to 15 micrometers. Finally, experiments will be conducted to verify the optimization model using fluorescent particles (0.3 to 10 micrometers). Experiments will be conducted in a closed-loop system. In this paper, we present how the critical geometry factors change the performance of a VI through 3-D simulation. In addition, we will present preliminary experimental data out of the 3-D model.