Abstract
The problem of the finite-amplitude electroconvection of a nonuniformly heated fluid filling a horizontal capacitor in the presence of the autonomous unipolar injection of a charge from an anode has been solved. In addition to the injected charge in a carrier fluid, the presence of proper ions (appearing owing to dissociation) ensuring the low residual conductivity of the fluid is assumed. The effect of the ratio of proper and injected ions, as well as the heating degree, on the thresholds of monotonic and oscillating electroconvection has been analyzed. The bifurcation diagrams of the solutions have been plotted for the cases of the heating of a layer from below and above. The electroconvection modes of the nonuniformly heated liquid that appear because of forward and backward bifurcations have been revealed.
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