ON THE ROLE OF CONDUCTIVITIES AND FREQUENCY IN THE ELECTRORHEOLOGICALEFFECT

The aim of this investigation is to establish in the case of DC field or low frequency field the role of conductivities of both suspending l iquid and particles in the electrorheological (ER) effect. We approach the problem in considering the case sigma S < sigma(L) and the case s igma S > sigma(L). For sigma(S) > sigma(L) we estimate an upper limit for sigma(S) to obtain stable chains. We also investigate the question of the transition between a behaviour determined by the conductivitie s of the constituents and the behaviour determined by their permittivi ties.