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 ?
This is manifested by the convection currents of the granules [23] and the differential solar rotation observed by Carrington [18].
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.
Indeed, convection currents in the mantle are responsible for most of the volcanic and tectonic processes that we see at Earth's surface.
Then somebody at the table next to you lights up a cigarette and the convection currents happen to be flowing in your direction.
This primary structure carries purlins and rafters in the normal way, with the rafters strutted at the same angle as the struts on the tied portals, creating in effect an inverted ridge that acts as a continuous lantern because, above it, the real ridge is defined by a motorized greenhouse glazing system that can be thrown open on hot days to encourage cooling convection currents.
Environmental factors that can contribute to heat stress besides high ambient temperature are low convection currents, high humidity, low evaporative loss, and high insulation levels around the body.