Loading...

Aerosol nano-particle charger simulations and optimizations

Shaygani, A ; Sharif University of Technology

914 Viewed
  1. Type of Document: Article
  2. Publisher: Sharif University of Technology
  3. Abstract:
  4. Size distribution of aerosol particles is prevalently obtained through electrical characterization techniques and study of charged particles' dynamics in the presence of electric field. In this work, a wire-cylinder corona charger is presented, redesigned, and aero dynamically optimized. An initial 2D axisymmetric geometry of the charger was employed for the simulations using the Computational Fluid Dynamics (CFD) commercial code FLUENT 6.3.26. Through successive attempts, a new geometry was obtained by streamlining the walls to eliminate the undesired vortices produced in the flow field of the previous ones. The process optimized the charger by minimizing losses and dilutions of the particles. For electrical simulations of the charger, a new numerical algorithm was designed based on the steady-state corona discharge to work with segregated solvers to satisfy governing equations. The algorithm was validated using a one-dimensional semi-analytic solution of corona discharge. Tracing particles for the optimized geometry, the percentage of losses was calculated 6%, whereas the loss in the old geometry was more than 30%. The average charge and charge distributions induced on particles were also calculated with evaluation of the residence times in the charger
  5. Keywords:
  6. Aerosol ; CFD ; Charger ; Corona discharge ; Nano ; Optimization ; Aerosols ; Charged particles ; Computational fluid dynamics ; Computational geometry ; Electric corona ; Electric fields ; Geometry ; Nanoparticles ; One dimensional ; Optimization ; Axisymmetric geometries ; Charger ; Corona discharges ; Electrical characterization ; Electrical simulation ; Nano ; Numerical algorithms ; Optimized geometries ; Residence time distribution
  7. Source: Scientia Iranica ; Volume 23, Issue 5 , 2016 , Pages 2220-2229 ; 10263098 (ISSN)
  8. URL: http://scientiairanica.sharif.edu/article_2285.html