1. Introduction

The electrostatic precipitators (ESP) are the

most widely used systems to reduce the particulate

emissions from large industrial process plant.

Essentially, electrostatic precipitators remove dust

by charging the constituent particles by means of

corona generated ions. Then the electrically

charged particles move towards the collecting

electrode under the effect of electric field present in

the inter-electrode space, which is produced by the

high voltage applied to the emitter electrode [1].

The determination of the electric field and

current density distributions in inter-electrode space

is further complicated by the presence of the corona

phenomenon. The space charge distribution may be

computed analytically only for particular symmetry

arrangements under some simplifying

assumptions [2]. Several models have been

proposed for the calculation of the electric field and

charge density distribution using the finite

difference method [3], finite element techniques [4]

which are usually combined with the method of

characteristics (MOC) [5], boundary element

method with MOC [6] and combined boundary

element with finite difference method [7]. Also,

alternative methodologies have been developed

such as the R-functions and MOC [8], the donor

cell method with finite elements [9], the charge

simulation technique (CSM) [10], and a model that

combines finite differences and finite elements

[11]. In the present paper, the calculation of the

electrical quantities is performed using a finite

element software, COMSOL MULTIPHYSICS.

The computed values are compared with those

obtained analytically [12] to assess the accuracy of

the obtained results. The calculated current-voltage

characteristics are compared with measured ones

carried out on a laboratory model of coaxial wirecylinder

electrostatic precipitator.

Therefore, the aim of the present work is to

validate a numerical model and to show that

modeling of electric field during the corona

discharge can be successfully performed using

COMSOL MULTIPHYSICS software.

2. Mathematical Model

The equations that constitute the mathematical

description of the corona phenomenon are obtained

请点击下载后查看:(download)Finite Element Solution for Ionized Fields in DC Electrostatic

*Corresponding author: Tel.: +33 383 68 48 58; fax: +33 383 68 44 98.

E-mail address: brahim.benamar#lermab.uhp-nancy.fr #换成@