Particle and aerosol research (한국입자에어로졸학회지)

Korean Association for Particle and Aerosol Research (한국입자에어로졸학회)
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Numerical Analysis of Electro-Hydrodynamic (EHD) Flows in Electrostatic Precipitators using Open Source Computational Fluid Dynamics (CFD) Solver

오픈 소스 전산 유체 역학 해석 프로그램을 이용한 전기집진기 내부 정전 유동 해석

  • Song, Dong Keun (Department of Eco-Machinery System, Environmental and Energy Systems Research Division) ;
  • Hong, Won Seok (Department of Eco-Machinery System, Environmental and Energy Systems Research Division) ;
  • Shin, Wanho (Department of Eco-Machinery System, Environmental and Energy Systems Research Division) ;
  • Kim, Han Seok (Department of Eco-Machinery System, Environmental and Energy Systems Research Division)
  • 송동근 (한국기계연구원 환경에너지기계연구본부 환경기계시스템연구실) ;
  • 홍원석 (한국기계연구원 환경에너지기계연구본부 환경기계시스템연구실) ;
  • 신완호 (한국기계연구원 환경에너지기계연구본부 환경기계시스템연구실) ;
  • 김한석 (한국기계연구원 환경에너지기계연구본부 환경기계시스템연구실)
  • Published : 2013.06.30
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Abstract

The electrostatic precipitator (ESP) has been used for degrading atmospheric pollutants. These devices induce the electrical forces to facilitate the removal of particulate pollutants. The ions travel from the high voltage electrode to the grounded electrode by Coulomb force induced by the electric field when a high voltage is applied between two electrodes. The ions collide with gas molecules and exchange momentum with each other thus inducing fluid motion, electrohydrodynamic (EHD) flow. In this study, for the simulation of electric field and EHD flow in ESPs, an open source EHD solver, "espFoam", has been developed using open source CFD toolbox, OpenFOAM(R) (Open Field Operation and Manipulation). The electric potential distribution and ionic space charge density distribution were obtained with the developed solver, and validated with experimental results in the literature. The comparison results showed good agreement. Turbulence model is also incorporated to simulate turbulent flow; hence the developed solver can analyze laminar and turbulent flow. In distributions of electric potential and space charge, the distributions become distorted and asymmetric as the flow velocity increases. The effect of electrical drift flow was investigated for different flow velocities and the secondary flow in a flow of low velocity is successfully predicted.

Keywords

References

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