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- W2051298560 abstract "The electrothermoconvective instability of a plane horizontal layer of a poorly conducting, ohmic liquid subjected to a varying electric field is investigated in the EHD approximation, when the charge formation is produced by electroconduction. First, the spatio-temporal distributions of the electric field, charge and temperature are found for the quasiequilibrium base state. Then Floquet theory is applied for finding various instability thresholds in the linear approximation with and without the effect of buoyancy. The influence of a time-dependent electric field modulation on the behavior of the liquid layer is studied with and without an additional steady component. The limit of low-frequency electric field modulation is also studied. We show that, depending on the amplitude and frequency of modulation, the electric field can stabilize an unstable base state or destabilize the equilibrium of the liquid. Besides synchronous and subharmonic responses to variations of the external electric field, the instability can be associated with two-frequency quasiperiodic disturbances. The stability maps of (thermal) Rayleigh number versus electrical Rayleigh number found, illustrate the interplay between thermoconvection and electroconvection." @default.
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- W2051298560 date "2000-03-01" @default.
- W2051298560 modified "2023-10-18" @default.
- W2051298560 title "Electrothermoconvective instability of an ohmic liquid layer in an unsteady electric field" @default.
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- W2051298560 doi "https://doi.org/10.1016/s0304-3886(99)00074-1" @default.
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