CONVECTION

Convection

Convection is the concerted, collective movement of groups or aggregates of molecules within fluids and rheids, either through advection or through diffusion or as a combination of both of them. Convection of mass cannot take place in solids, since neither bulk current flows nor significant diffusion can take place in solids. Diffusion of heat can take place in solids, but that is called heat conduction. Convection can be demonstrated by placing a heat source at the side of a glass full of a liquid, and observing the changes in temperature in the glass caused by the warmer fluid moving into cooler areas.

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convection

Noun

  1. The process of conveying something.
  2. The transmission of heat in a fluid or gas by the circulation of currents.
  3. The vertical movement of heat and moisture, especially by updrafts and downdrafts in an unstable air mass. The terms convection and thunderstorm are often used interchangeably, although thunderstorms are only one form of convection. Towering cumulus clouds are visible forms of convection.


The above text is a snippet from Wiktionary: convection
and as such is available under the Creative Commons Attribution/Share-Alike License.

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