Topical Problems of Fluid Mechanics


Institute of Thermomechanics AS CR, v.v.i.	CTU in Prague Faculty of Mech. Engineering Dept. Tech. Mathematics	MIO Université du Sud Toulon Var - AMU - CNRS - IRD	Czech Pilot centre ERCOFTAC

Two-Dimensional Modeling of Particle Trajectory in Electrohydrodynamic (EHD) Fluid Using Finite Elements
Reihany O., Reza-Zadeh N.
Abstract:
In this paper, particle trajectory and flow streamlines which are influenced by EHD (electrohydrodynamic) flow and primary flow have been investigated in an electrostatic precipitation mechanism. This system consists of a grounded oval cylinder that is between two parallel collecting grounded plates. The research consists of numerical simulations for the prediction of ions, gas and particles motion in the channel. The simultaneous interaction of gas flow, particle motion and electrostatic field on electrostatic precipitator has been studied by applying the Finite Element Method to the system of partial differential equations. The electrostatic field and ionic space charge density have been solved by Poisson and current continuity equations. Effects of ion wind induced secondary electrohydrodynamic flow of air resolved by Navier-stokes equations. Particle trajectory has been predicted by calculating the forces applied to a particle. Numerical results are: (a) the gas flow field (velocity, pressure), and (b) the particle history (trajectories, deposition). The provided detail shows that EHD secondary flow increases the turbulence intensity of the ESP system. Moreover, EHD flow not only does increase the positive pressure on grounded electrodes, but it also diverts more particle towards parallel grounded plates.
Keywords:
Particle tracing , Electrohydrodynamics , Ion wind

Fulltext: PDF DOI: http://dx.doi.org/10.14311/TPFM.2016.024

In Proceedings Topical Problems of Fluid Mechanics 2016, Prague, 2016 Edited by David Šimurda and Tomáš Bodnár, pp. 177-184 ISBN 978-80-87012-58-1 (Print) ISSN 2336-5781 (Print)