convection
n. 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 | ||||
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Convection Definition from Language, Idioms & Slang Dictionaries & Glossaries
| Webster's Revised Unabridged Dictionary (1913) |
Convection
(n.)
The act or process of conveying or transmitting.
(n.)
A process of transfer or transmission, as of heat or electricity, by means of currents in liquids or gases, resulting from changes of temperature and other causes.
(n.)
The act or process of conveying or transmitting.
(n.)
A process of transfer or transmission, as of heat or electricity, by means of currents in liquids or gases, resulting from changes of temperature and other causes.
| WordNet 2.0 |
convection
Noun
1. the transfer of heat through a fluid (liquid or gas) caused by molecular motion
(hypernym) temperature change
2. (meteorology) the vertical movement of heat or other properties by massive motion within the atmosphere
(hypernym) natural process, natural action, action, activity
(derivation) convect
(classification) meteorology
Noun
1. the transfer of heat through a fluid (liquid or gas) caused by molecular motion
(hypernym) temperature change
2. (meteorology) the vertical movement of heat or other properties by massive motion within the atmosphere
(hypernym) natural process, natural action, action, activity
(derivation) convect
(classification) meteorology
Convection Definition from Science & Technology Dictionaries & Glossaries
| WEATHER&METEOROLOGY |
CONVECTION
Motions in a fluid that transport and mix the properties of the fluid. These properties could be heat and/or moisture. When used to imply only upward vertical motion, it is then the opposite of subsidence.
Motions in a fluid that transport and mix the properties of the fluid. These properties could be heat and/or moisture. When used to imply only upward vertical motion, it is then the opposite of subsidence.
| A COMPREHENSIVE GLOSSARY OF WEATHER |
Convection
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.
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.
| Energy Glossary |
CONVECTION
Transferring heat by moving air, or transferring heat by means of upward motion of particles of liquid or gas heat from beneath.
Transferring heat by moving air, or transferring heat by means of upward motion of particles of liquid or gas heat from beneath.
| Dictionary of Automotive Terms |
Convection
The transfer of heat from one object to another when the hotter object heats the surrounding air and the air in turn heats the other object.
The transfer of heat from one object to another when the hotter object heats the surrounding air and the air in turn heats the other object.
| Astronomy and Physics Terms by ExploreSpace.com |
Convection
Fluid circulation driven by temperature gradients; the transfer of heat by this automatic circulation (see also Educator's Guide to Convection).
Fluid circulation driven by temperature gradients; the transfer of heat by this automatic circulation (see also Educator's Guide to Convection).
| Electrochemistry Dictionary |
convection
"A mass-transport mechanism that involves bulk movement of a solution (contrast with diffusion that involves individual molecules or ions). We differentiate ""forced"" convection from ""natural"" convection. The simplest example of forced convection is mechanical stirring. If a non-uniform solution is stirred, the solute is ""transported"" from the high concentration parts of the solution to the low concentration parts till the solution becomes completely uniform. Other examples of forced convection are the ""flow"" of a solution through a pipe or a porous separator driven by pressure difference. ""Natural"" convection is very important in electrochemistry. It always occurs at the surface of an electrode carrying current in the absence of ""forced"" convection. As electrode reaction is proceeding, the buildup of reaction products and the consumption of reactants changes the density of the solution layer close to the electrode surface compared to that of the bulk solution. Eventually, this density difference will force the surface solution layer to sink or rise, setting up a ""natural stirring"" action close to the electrode surface which will tend to equalize the surface and bulk concentrations. As a ""rule of thumb,"" natural convection starts after about a minute of current flow. "
"A mass-transport mechanism that involves bulk movement of a solution (contrast with diffusion that involves individual molecules or ions). We differentiate ""forced"" convection from ""natural"" convection. The simplest example of forced convection is mechanical stirring. If a non-uniform solution is stirred, the solute is ""transported"" from the high concentration parts of the solution to the low concentration parts till the solution becomes completely uniform. Other examples of forced convection are the ""flow"" of a solution through a pipe or a porous separator driven by pressure difference. ""Natural"" convection is very important in electrochemistry. It always occurs at the surface of an electrode carrying current in the absence of ""forced"" convection. As electrode reaction is proceeding, the buildup of reaction products and the consumption of reactants changes the density of the solution layer close to the electrode surface compared to that of the bulk solution. Eventually, this density difference will force the surface solution layer to sink or rise, setting up a ""natural stirring"" action close to the electrode surface which will tend to equalize the surface and bulk concentrations. As a ""rule of thumb,"" natural convection starts after about a minute of current flow. "
| Technical English by wpv |
Convection
1. The circulatory motion that occurs in a fluid at a non-uniform temperature owing to the variation of its density and the action of gravity. 2. The transfer of heat by this automatic circulation of fluid.
1. The circulatory motion that occurs in a fluid at a non-uniform temperature owing to the variation of its density and the action of gravity. 2. The transfer of heat by this automatic circulation of fluid.
| Physical Geography Terms and Meanings |
Convection
Convection involves the transfer of heat energy by means of vertical mass motions through a medium.
Convection involves the transfer of heat energy by means of vertical mass motions through a medium.
| Electronics Terminology |
Convection
The transfer of heat by movement of hot air. (Often used in conjunction with infrared radiation to reduce the effect of IR shadowing. )
The transfer of heat by movement of hot air. (Often used in conjunction with infrared radiation to reduce the effect of IR shadowing. )
| Solar Physics Glossary |
Convection
The physical upwelling 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 .
The physical upwelling 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 .
| NCRS Construction Glossary |
CONVECTION
A method of transferring heat by the actual movement of heated molecules, usually by a freestanding unit such as a furnace.
A method of transferring heat by the actual movement of heated molecules, usually by a freestanding unit such as a furnace.
Convection Definition from Society & Culture Dictionaries & Glossaries
| Environmental Engineering (English ver.) |
CONVECTION
(1) (Physics) Heat transfer in a gas or liquid by the circulation of currents from one region to another; also fluid motion caused by an external force such as gravity. (2) (Meteorology) The phenomenon occurring where large masses of warm air, heated by contact with a warm land surface and usually containing appreciable amounts of moisture, rise upward from the surface of the earth.
(1) (Physics) Heat transfer in a gas or liquid by the circulation of currents from one region to another; also fluid motion caused by an external force such as gravity. (2) (Meteorology) The phenomenon occurring where large masses of warm air, heated by contact with a warm land surface and usually containing appreciable amounts of moisture, rise upward from the surface of the earth.
Convection Definition from Entertainment & Music Dictionaries & Glossaries
| English to Federation-Standard Golic Vulcan |
Convection
da-kuv-falek'es
da-kuv-falek'es
Convection Definition from Religion & Spirituality Dictionaries & Glossaries
| Webart Magic Astronomical Glossary |
Convection
The physical upwelling 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. One of three modes of transmission of heat (energy) from hot regions to cold regions; involves motions of masses of material
The physical upwelling 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. One of three modes of transmission of heat (energy) from hot regions to cold regions; involves motions of masses of material
Convection Definition from Encyclopedia Dictionaries & Glossaries
| Wikipedia English - The Free Encyclopedia |
Convection
Convection in the most general terms refers to the movement of currents within fluids (i.e. liquids, gases and rheids).
Convection is one of the major modes of heat and mass transfer. In fluids, convective heat and mass transfer take place through both diffusion – the random Brownian motion of individual particles in the fluid – and by advection, in which matter or heat is transported by the larger-scale motion of currents in the fluid. In the context of heat and mass transfer, the term "convection" is used to refer to the sum of advective and diffusive transfer.
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