Convection Current


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convection current

[kən′vek·shən ‚kər·ənt]
(electronics)
The time rate at which the electric charges of an electron stream are transported through a given surface.
(geophysics)
Mass movement of subcrustal or mantle material as the result of temperature variations.
(meteorology)
Any current of air involved in convection; usually, the upward-moving portion of a convection circulation, such as a thermal or the updraft in cumulus clouds. Also known as convective current.

Convection Current

 

the transfer of electric charges by the movement of a charged macroscopic body. From the viewpoint of electron theory, any transfer of charges is, in the final analysis, due to the convection (or movement) of charged microparticles. This explains the complete identity between the magnetic properties of convection current and a conduction current (that is, the ordered movement of electrons, ions, and other particles relative to a body), which was established by the experiments of the American physicist G. Rowland (1879) and the Russian physicist A. A. Eikhenval’d (1903).

convection current

The transfer of heat that results from the movement of air from one location to another, usually as a result of a stream of air produced by thermal convection caused by differences in temperature.
References in periodicals archive ?
Based on his objection, Planck recognized that the Sun supported convection currents.
The air becomes very humid and unstable, and this sets up strong convection currents.
TAKHAR, Radiation effects on free convection currents flow past semi-infinite vertical plate, Modelling, Measurement and control, B51 (1993), 31-40.
He was the first to propose that slow-moving convection currents in the Earth's mantle caused continental break up, seafloor formation, crustal assimilation and continental drifting.
Cooling is also a problem, despite the extreme cold of the vacuum of space, because there are no convection currents to move heat away from the router.
The environment surrounding the drying coating experiences fluctuations in temperature and in the rate of cooling caused by fluctuations in convection currents in the surrounding air.
The ground heats up, producing convection currents, sucking every drop of moisture from the land and whips the air's molecules into a frenzy of activity, kicking up stinking winds and horrid humidity.
Physically this can be justified, because in the process of externally cooling of the plate, the free convection currents travel away from the plate.
The convection currents inside the liquid and at the solid liquid interface are ignored;
The effects of the permeability parameter (K) and free convection currents (both Gr and Gm) on the velocity field are shown in Fig.
Before their data streams of convection currents and computer modelling of pressure differentials, weather forecasters would present their prognostications in far more dogmatic fashion.