convection cell


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convection cell

[kən′vek·shən ‚sel]
(geophysics)
A concept in plate tectonics that accounts for the lateral or the upward and downward movement of subcrustal mantle material as due to heat variation in the earth.
(meteorology)
An atmospheric unit in which organized convective fluid motion occurs.
References in periodicals archive ?
Figure 11 exemplarily shows the visualization by particle trajectories of a convection cell.
1) Their concave design creates an air space, called a convection cell, under the computer which allows the heat that radiates from the bottom of the laptop to escape upwards.
Within the large mass of circulating air, called a convection cell, vortices often form in the region between the upwelling center and the downdrafts along its outer rim, he notes.
Mathematically, the distance between these instabilities, and hence the size of the resulting convection cell, can be shown to measure a little more than twice the thickness of the convecting layer, regardless of the specific properties of the material.
In fact, it's often claimed that, when the seeing is less than ideal, smaller apertures are affected by fewer convection cells (or perhaps only one) and thus can provide a more stable image compared to that from a larger instrument.
The sun is covered with granular convection cells similar to a pot of water at a rolling boil.
The 'X' feature is likely one of these - a former quadruple junction where four convection cells meet," NASA said.
Once at the surface, much of the plasma's energy radiates into space; the cooler, denser plasma then sinks, driving further convection and creating circulating loops called convection cells.
On very small scales this is basic molecular convection, but as we get into scales of tens and hundreds of feet, these convection cells aggregate into thermals.
The entire surface is riddled with granulation: small convection cells of hot gas rising from below, breaking up, and sinking back down on a timescale of just a few minutes.
In the near-surface region, small-scale convection cells - about the size of California - generate sound waves that travel to the interior of the Sun and are refracted back to the surface.
Sloping roofs can result in convection cells, and worse.