The behaviour of low conducting liquid in modulated electric field

Author

Smorodin, B.L.

Author_Institution

Perm State Univ., Russia

fYear

2002

fDate

2002

Firstpage

425

Lastpage

428

Abstract

The electrothermoconvective instability of a low conducting liquid in modulated electric field of a plane horizontal capacitor is investigated in the electrohydrodynamic (EHD) approximation for arbitrary field modulation frequencies and various shapes (harmonic and triangular). The charge formation is produced either due to dielectrophoresis or due to the nonhomogeneous conductivity. The Floquet theory is used to find the convection thresholds. Stability maps of electrical Rayleigh number versus inverse frequency are given. Depending on the amplitude and frequency of modulation, the electric field can destabilize the equilibrium of the liquid. The stability of the liquid layer is also investigated with and without the effect of buoyancy.

Keywords

convection; electrohydrodynamics; flow instability; arbitrary field modulation frequencies; buoyancy; charge formation; electrical Rayleigh number; electrohydrodynamic approximation; electrothermoconvective instability; harmonic; inverse frequency; low conducting liquid; modulated electric field; plane horizontal capacitor; triangular; Amplitude modulation; Capacitors; Conductivity; Dielectric liquids; Frequency; Permittivity; Shape; Stability; Temperature; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Dielectric Liquids, 2002. ICDL 2002. Proceedings of 2002 IEEE 14th International Conference on

Print_ISBN

0-7803-7350-2

Type

conf

DOI

10.1109/ICDL.2002.1022783

Filename

1022783