Abstract
UDC 537.84: 538.3:538.4
https://doi.org/10.52577/eom.2023.59.3.32
The results of experimental and theoretical studies of the electrical conductivity of weakly concentrated solutions of liquid dielectrics (LD) with a chemically active impurity and associated electrohydrodinamic (EHD) flows are presented. The studies were carried out on the base of a multi-ion model of electrical conductivity, which makes it possible to adequately describe both the dissociation-recombination interactions of ions and the electrochemical injection of ions from the electrode surface. It is shown that recombination processes in the volume of the LD lead to a slow disappearance of the space charge with a characteristic time of hours and days, which does not allow to significantly reduce the distribution of the space charge in the LD, which reduces the intensity of EHD flows. On the base of the obtained theoretical and experimental data on electrical conductivity, numerical calculations were carried out which confirmed the results of observations on the development and structure of EHD flows and current characteristics.
Keywords: ion, dipole, polarization, dielectric permeability, liquid dielectric, electric field, electric field strength, electric current, electrochemical reaction, injection of charges, electrohydrodinamic flow, current-voltage characteristic, recombination.