The effect of an electric field on the surface energy and electron work function of thin films of alkali metal alloys

Kanchukoev, V. Z.; Kashezhev, A. Z.; Mambetov, A. Kh.; Созаев, В. А.

doi:10.1134/1.1490976

Cited by 2 publications

(2 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The model assumes that electromagnetism has no effect on the interface (surface) tension. However, it should be borne in mind that the electric field (electric current) can affect surface energy (this phenomenon was observed, for example, in experiments with alloys of alkali metals [3]). Let us formulate a mathematical model for our problem.…”

Section: Theoretical Model Problem Statementmentioning

confidence: 97%

“…Then Eq. (9) becomes 3. Schematic images of the location of an inclusion associated with thermocapillarity and electromagnetism energies: two close locations in the medium with temperature that linearly increases with height and inducing energy E σ and electromagnetic field E em that cause decreasing E em with height; arbitrary location (inclusion center at z = z 1 ); subsequent location of this inclusion (center at z = z 2 = = z 1 + Δz)…”

Section: Theoretical Model Problem Statementmentioning

confidence: 98%

See 1 more Smart Citation

Phoresis of inclusions in viscous media under the combined action of electromagnetism and thermocapillarity: theory

Raichenko

2011

Powder Metall Met Ceram

View full text Add to dashboard Cite

The motion of a spherical inclusion in a fluid medium under the combined action of crossed electric and magnetic fields and thermocapillarity is studied theoretically. This motion (phoresis) can be qualified as an elementary motion of fine particles in suspensions, emulsions, aerosols, and liquid foamed materials. A term is introduced into the Stokes equation for a fluid inclusion, which takes into account the thermocapillary force acting on the inclusion due to temperature nonuniformity. Boundary conditions on the particle-medium surface are formulated properly. The solution to the system of equations (Stokes equations for the inclusions and medium, boundary conditions) provides an expression for the velocity of an inclusion in a viscous conducting medium under the combined action of thermocapillarity and electromagnetism. The expression for the velocity of phoresis in dimensionless categories provides the ratio between the viscosity and thermal conductivity of the particle and medium and contains a new dimensionless term, such as the ratio between the thermocapillary and electromagnetic effects (analogue of the Weber number). The formulas derived can be used to calculate the rate of transfer in conducting suspensions and emulsions containing various inclusions. The velocity of bubbles in molten metals (Cu, Al, Fe, Ag) is calculated to show that the effects of electromagnetism and thermocapillarity are comparable. The theoretical approach can be useful for developing a flexible method in the electrotechnology of fluid materials. OBJECTIVEThe production of multiphase (composite) materials often requires the use of processes involving various effects. A process may sometimes include methods related to different areas of science and technology.Foamed metals are an example of composite materials. This paper deals with scientific problems that underlie the technology of foamed metals and focuses on the theory of motion (phoresis) of a spherical inclusion in a fluid medium (molten metal) under the combined action of a gradient temperature field and crossed electric and magnetic fields. It is assumed that gravitation is absent.The effects considered in this paper can partially occur during liquid-phase sintering of powder bodies under the applied electromagnetic field.

show abstract

Section: Theoretical Model Problem Statementmentioning

confidence: 97%

Section: Theoretical Model Problem Statementmentioning

confidence: 98%