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convection

fluid circulation driven by large temperature gradients; the transfer of heat by this automatic circulation

Convection is the process by which heat travels through air, water, and other gases and liquids. clouds which lift warm, moist air by convection high into the atmosphere. the movement in a gas or liquid caused by warm gas or liquid rising, and cold gas or liquid sinking (convectio, from convehere , from com- ( COM-) + vehere ). Process by which heat is transferred by movement of a heated fluid such as air or water. Most fluids expand when heated. They become less dense and more buoyant, and so rise. The heated molecules eventually cool, become more dense, and sink. This repeated process sets up convection currents that account for the uniform heating of the air in a room or water in a kettle. Air convection can be forced by a fan, and water convection by a pump. Atmospheric convection currents can be set up by local heating effects such as solar radiation or contact with cold surfaces. Such currents are usually vertical and account for atmospheric phenomena such as clouds and thunderstorms

the transfer of heat through a fluid (liquid or gas) caused by molecular motion

(pronounce: kon-vek-shun) convectio = [Latin] bring together, from con- = with, and vectio = carry Convection is a form of energy transport in which the material with the energy in it moves The hotter material moves toward the cooler area and the cooler material toward the hotter area On Earth, you can see convection in a pan of boiling water (where hot water moves up and cooler water moves down), and also in a thunderstorm (where warmer, moist air moves up and forms clouds) You can also find convection in the convection zone of the Sun, and in granulation

The transmission of heat in a fluid or gas by the circulation of currents

Convection is when heat is exchanged or moves from one place to another The handle of a pan gets hot as heat energy moves (convects) through the metal

fluid circulation driven by temperature gradients in the presence of gravity; the transfer of heat by this mechanism

(meteorology) the vertical movement of heat or other properties by massive motion within the atmosphere

Convection is the transfer of heat by the circulation or movement of heated parts in a liquid or gas Convection is also the circulatory motion that occurs in a fluid which is at a nonuniform (or varying) temperature caused by the variation of the density of liquid at different temperatures and the action of gravity

The bulk transport of plasma (or gas) from one place to another, in response to mechanical forces (for example, viscous interaction with the solar wind) or electromagnetic forces

The process of heat transfer between a solid surface and a moving liquid or gas

transfer of heat through a liquid or gas by the actual movement of the liquid or gas; associated with large-scale, vertical movements within the atmosphere, or movement and mixing of water masses in the ocean, or vertical and lateral movements of a subcrustal material in the earth's mantle

Generally, transport of heat and moisture by the movement of a fluid In meteorology, the term is used specifically to describe vertical transport of heat and moisture, especially by updrafts and downdrafts in an unstable atmosphere The terms "convection" and "thunderstorms" often are used interchangeably, although thunderstorms are only one form of convection Cbs, towering cumulus clouds, and ACCAS clouds all are visible forms of convection However, convection is not always made visible by clouds Convection which occurs without cloud formation is called dry convection, while the visible convection processes referred to above are forms of moist convection

The act or process of conveying or transmitting

convectio = [Latin] bring together, from con- = with, and vectio = carry Convection is a form of energy transport in which the material with the energy in it moves The hotter material moves toward the cooler area and the cooler material toward the hotter area On Earth, you can see convection in a pan of boiling water (where hot water moves up and cooler water moves down), and also in a thunderstorm (where warmer, moist air moves up and forms clouds) You can also find convection in the convection zone of the Sun, and in granulation

The physical up-welling of hot matter, thus transporting energy from a lower, hotter region to a higher, cooler region A bubble of gas that is hotter than its surroundings expands and rises When it has cooled by passing on its extra heat to its surroundings, the bubble sinks again Convection can occur when there is a substantial decrease in temperature with height, such as in the Sun's convection zone

A self-starting circulation in a fluid (such as air or water), where a warm current rises into a cool area, and a cool current descends to take its place Convection is driven by gravity -- warm fluids are usually lighter than denser cold fluids, and gravity drags the densest material to the bottom

{i} circulation of heat; thermal conduction, transmission of heat by circulatory movement in a fluid or gas that results in areas of different temperatures and distinctive densities which rise and fall in reaction to gravity (Physics); conveying, act of transmitting, act of transporting; (Meteorology) upright movement of heat in enormous motion inside the atmosphere

The process of conveying something

Convection involves the transfer of heat energy by means of vertical mass motions through a medium

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