INVESTIGATION OF THE MICROPHYSICAL CHARACTERISTICS OF AEROSOLS BY THE METHOD
OF ELECTRODYNAMIC SUSPENSION OF PARTICLES.
1. STRUCTURE OF THE EDS AND DETERMINATION OF THE DRAG FORCE OF MICROPARTICLES

V. A. Runkov, P. E. Suetin, and S. A. Beresnev

UDC 531.75+541.18 

This paper describes the structure of an electrodynamic 
suspension (EDS) with flat electrodes for investigating a complex 
of characteristics of charged microparticles and the surrounding gas. 
A linear theory of oscillatory motion of a microparticle in the EDS 
volume has been developed and analytical expressions for the oscillation 
amplitude and the center of oscillation of a particle depending on 
the electrode voltage value have been obtained. The stability boundary 
of motion of particles of various substances for the EDS of the given 
configuration has been determined theoretically. For the first time 
the dynamic behavior of aerosols in the EDS in a wide range of change 
in the surrounding gas pressure (Knudsen number) has been studied 
experimentally, in particular, data for the drag force of a particle 
have been obtained. Comparison between the experimental and theoretical 
data has been made.

Urals State University, Ekaterinburg, Russia; email: Sergey.Beresnev@usu.ru. 
Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 76, No. 2, pp. 
3-8, March-April, 2003. Original article submitted October 
16, 2002.