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This paper aims at analysis of the monopolar ionized field in electrostatic precipitator. A numerical model for simulating precipitation of particles in electrostatic precipitator is discussed in this paper. It includes all essential phenomena affecting the process. An iterative finite‐element technique is used to solve Poison's equation. We proposed the introduction of a potential corresponding to the critical minimum ionization field directly in the finite element formulation as a Dirichlet condition. The theoretical migration velocity is obtained by balancing the drag force with the Coulomb force or electrostatic force acting on a particle. We used the model introduced by Cochet for predicting a particle charge. The model assumes that a particle of the same size attains an equivalent maximum amount of charge for a charging time equal to infinity. Particles influence the electrical field, flow field, electrical migration velocity, gas discharge, particle charge and collection efficiency. Copyright © 2014 John Wiley & Sons, Ltd.

This paper aims to analyse the behavior of dc corona discharge in wire-to-plane electrostatic precipitators (ESP) depending on the pressure. Current-voltage curves are analyzed particularly. Experimental results show that discharge current is strongly affected by the pressure for a given atmospheric condition. Changing the values pressure does not only changes the property of the gas but also affects the corona onset conditions and ion mobility. The finite-element method is used to solve Poisson's equation and a modified method of characteristics is used to satisfy the current continuity condition. The two methods are repeated iteratively to obtain a selfconsistent solution of the describing equations. We used the model which separates the corona in two distinct regions. Comparing the computed results with previously obtained experimental and calculated values tests the effectiveness of this approach. The agreement with experimental results is found to be satisfactory.