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convection
[kuhn-vek-shuhn]
noun
Physics.the transfer of heat by the circulation or movement of the heated parts of a liquid or gas.
Meteorology.the vertical transport of atmospheric properties, especially upward (advection ).
the act of conveying or transmitting.
convection
/ əˈɛʃə /
noun
a process of heat transfer through a gas or liquid by bulk motion of hotter material into a cooler region Compare conduction
meteorol the process by which masses of relatively warm air are raised into the atmosphere, often cooling and forming clouds, with compensatory downward movements of cooler air
geology the slow circulation of subcrustal material, thought to be the mechanism by which tectonic plates are moved
convection
Current in a fluid caused by uneven distribution of heat. For example, air on a part of the Earth's surface warmed by strong sunlight will be heated by contact with the ground and will expand and flow upward, creating a region of low pressure below it; cooler surrounding air will then flow in to this low pressure region. The air thus circulates by convection, creating winds.
See Note at conduction
convection
The motion of warm material that rises, cools off, and sinks again, producing a continuous circulation of material and transfer of heat. Some examples of processes involving convection are boiling water, in which heat is transferred from the stove to the air; the circulation of the atmosphere of the Earth, transferring heat from the equator to the North Pole and South Pole; and plate tectonics, in which heat is transferred from the interior of the Earth to its surface.
Other Word Forms
- convectional adjective
- Dzˈپ adjective
- DzˈپDzԲ adjective
Word History and Origins
Origin of convection1
Word History and Origins
Origin of convection1
Example Sentences
Bennett has turned to ChatGPT, which she refers to as “Chat,” to find vendors for a kitchen renovation project, compare heat pumps and weigh in on whether she should buy a convection oven.
To explain these observations, two separate research groups proposed more than 20 years ago that the planets must have layers that can't mix, thus preventing large-scale convection and a global dipolar magnetic field.
The mountains trap hot air and circulate the heat like a convection oven.
Bush, for example, recently listed a Montague Co. convection oven for $9,500 — far below its original price of roughly $21,000.
"Yes, more water vapor in the air can foster stronger convection, but a tornado is a very local feature and requires a very specific set of meteorological conditions, such as the right wind shear."
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Related Words
When To Use
Convection is the transfer of heat by the movement of heated parts of liquids and gases. Convection happens in liquids and gases because, unlike in a solid, molecules are able to freely move.For example, the air molecules in your living room continually move around, all moving at about the same speed. However, if you turn on an electric heater, the air particles close to the heater will get hotter, which means they will have more energy and will move faster. Faster-moving particles are less dense, or lighter, and will flow to the top of the living room. Colder particles are denser and will move down toward the floor when the hot particles move up. This movement of hot air is convection.The cold particles that move toward the floor will now be close to the heater. They, too, will heat up and move faster. And just like the earlier particles, these particles will move up, pushing colder particles down. This cycle is called a convection current or a convection cycle. The cycle will continue until an outside force changes things, such as turning off the heater.
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