Results 161 to 170 of about 1,633 (176)

Electroconvective purification of dielectric liquids

Technical Physics Letters, 2008
Transformer oil (TO) containing considerable amounts of suspended carbonaceous particles, water, and gases can be effectively purified by means of turbulent electroconvection, which is induced in the dielectric liquid under the action of ponderomotive forces arising in an inhomogeneous alternating electric field.
G. M. Mikheev, Gr. M. Mikheev, V. A. Tarasov, T. G. Mikheeva   +3 more
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Traveling-Wave Induced Electroconvection

The Physics of Fluids, 1966
An electrohydrodynamic traveling-wave induction interaction is shown to pump slightly conducting liquids [electrical conductivities 10−5 to 10−15 (Ω·m)−1] without electrical contact with the flow. A gradient in fluid conductivity perpendicular to the direction of flow is required.
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Electroconvection of liquid dielectrics

Journal of Applied Mechanics and Technical Physics, 1974
Ponderomotive forces, which are responsible for electroconvection, were investigated in relation to the properties of the liquid and the strength of the electric field of an infinite charged plate. The obtained solutions were used to obtain a parameter of the relative intensification of heat transfer in various dielectrics in an external electrostatic ...
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Electroconvectional Heat Transfer in Gases

The Journal of Chemical Physics, 1958
Electroconvectional heat transfers have been measured in gaseous N2, CO2, NH3, SO2, and CCl3F. The results are interpreted and correlated according to the theories of Kronig and of Senftleben and Bültmann. The theoretical predictions of Senftleben and Bültmann concerning the dependence of the electroconvectional heat transfer on the pressure of the gas
Sigurds Arajs, Sam Legvold
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Preparation of subharmonic patterns in nematic electroconvection

Physical Review E, 2004
Nematic electroconvection is studied under asymmetric periodic excitation with a driving electric field E(t)=E(t+T) not equal -E(t+T/2). A new dynamic regime, distinguished by subharmonic dynamics, is discovered in the pattern state diagram between conventional conductive and dielectric regimes.
Thomas, John, Ralf, Stannarius
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Charge transport measurement during turbulent electroconvection

Physical Review E, 2001
We report measurements of the energy dissipation during electroconvection of a nematic liquid crystal in the fully turbulent regime. The energy dissipation is quantified by measuring the electric current at constant potential difference. In certain cases, we observe the surprising result that the dimensionless energy dissipation ceases to increase with
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Unipolar Injection Induced Electroconvection

1998
Up to now we considered the convection of rather limited amplitude and we implicitly assumed that the convective pattern is well defined so that we deal with nearly identical convective cells of long life time compared with the mean rotation time in a cell.
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Electroconvective jets in liquid dielectrics

Fluid Dynamics, 1984
The principal feature of electroconvective jets in liquid dielectrics developing under the influence of a high-voltage external field is the large value of the EHD interaction parameter. This leads to the coupling of the hydrodynamic and electric problems. As formulated in [1, 2] the situation is reversed: the EHD interaction parameter is small.
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Investigation of electroconvection and electroconvective heat transfer in liquid dielectrics with unipolar injection conductivity

Fluid Dynamics, 1988
The characteristics of electroconvection and electroconvective heat transfer in liquid dielectrics possessing unipolar injection conductivity [1, 2] are investigated and certain types of EHD pumps are calculated. These investigations are necessary because so far there is no theoretical explanation for the slowing of heat transfer with increase in ...
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OVERSTABLE ELECTROCONVECTIVE INSTABILITIES

The Quarterly Journal of Mechanics and Applied Mathematics, 1978
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