Structure of the near-electrode dissociation-recombination charged layers at various low-voltage conductivities of a low-conducting liquid

The current passage through a low-conducting liquid is simulated for a system of electrodes with a highly nonuniform electric-field distribution at voltages lower and higher than the threshold of appearance of electrohydrodynamic flows. The structure of the near-electrode dissociation-recombination charged layers is considered in terms of the following two-charge formation models: constant dissociation in the volume but without injection and injection from an electrode and constant dissociation in the volume. The change in the polarity of the near-electrode charged layer caused by an increase in the voltage or a change in the low-voltage conductivity of the liquid is analyzed. Two types of electrohydrodynamic flows, which appear in real electrohydrodynamic devices and have opposite directions, are obtained using one mathematical model.