A natural circulation of fluid. The hot fluid (lighter) rises and the cool fluid (heavier) sinks.

The tendency of cold, dense fluids to fall and displace warm, less dense fluids.

Is a means of transferring heat through mass flow. Also the transfer of heat within a fluid by movements within the fluid.( 081)

A mechanism of heat transfer in a flowing material in which hot material from the bottom rises because of its lesser density, while cool surface material sinks. (Compare Heat conduction.)

In convection, heat is carried from one place to another by the bodily transfer of the matter containing it. In particular, this is the method by which heat raises the temperature of a fluid mass. That part in close contact with the heating agent expands and rises, moving away from it, while colder fluid moves in to take its place. This action in the atmosphere gives rise to convectional currents which may produce cumulus or cumulonimbus cloud.

(HVAC) Process of heat carried from one point to another by movement of liquid or a gas (i.e. air).  Natural convection is caused by expansion of the liquid or gas when heated.  Expansion reduces the density of the medium, causing it to rise above the cooler, more dense portions of the medium.  Gravity heating systems are examples of the use of natural convection.  The air, heated by the furnace, becomes less dense (lighter) and rises, distributing heat to various areas of the house without any type of blower.  When a blower is used, the heat transfer is called "forced convection".

another sobering physics lesson: the circulation of cold air in exchange for warm, which happens when you're without a windproof shell in blustery conditions. The body will continuously attempt to heat the frigid air, causing you to become cold.

Transfer of heat by means of movement or flow of liquid or gas.

Rising air currents due to heating as sunlight warms the ground and the lower atmosphere. Warm air rises because it is less dense after it expands. Convection is the process that leads to the formation of thunderstorms.

The motion of a liquid driven by gravity and temperature differences in the material. In the Earth, where pressure and temperature are high, rocks can act like viscous fluids on a time scale of millions of years. Thus, scientists believe that convection is an important process in the rocks that make up the Earth.

The transfer of energy by moving currents in a fluid.

The transmission of heat by the circulation of a liquid or gas. It may be natural, with the circulation caused by buoyancy affects due to temperature differences, or forced with circulation caused by a mechanical device such as a fan or pump.

the vertical circulation of a fluid in response to uneven heat distribution.

Transmission of heat energy by the rise of buoyant hot material and sinking of cold material.

Rotational flow of a fluid resulting from imbalances in density. This often occurs because the fluid below is heated and becomes less dense than the fluid above or because the fluid above is cooled and becomes more dense than the fluid below.

heat transfer by rising and falling streams of gas.

The rising of warm air and the sinking of cool air. Heat mixes and moves air. When a layer of air receives enough heat from the Earth's surface, it expands and moves upward. Colder, heavier air flows under it which is then warmed, expands, and rises. The warm rising air cools as it reaches higher, cooler regions of the atmosphere and begins to sink. Convection causes local breezes.

The circulatory motion that occurs in fluids due to differences in temperature within the fluid. One example of convection in Earth Science is mantle convection that drives plate tectonics.

The mechanical transfer of heated molecules of a gas or liquid from a source to an other area.

Heating air to create a warm air current as a means of circulating heat throughout a space.

The transference of heat from one part of a liquid or gas to another through the movement of the particles themselves. As a rule, the hotter molecules always move to the cooler ones.

the act of a fluid, such as air or water, coming in contact with an object that is at a higher temperature. This contact causes convection currents to form as fluid of higher temperature moves to areas of cooler temperature.

Transfer of heat by natural movement of fluid or air.

the transport of heat due to the motion of heated substance, such as a gas.

Rising warm air and falling cool air. The transfer of energy by moving currents of fluid or gas containing energy.

the heat transfer process that occurs when warm fluid or air rises, displacing the cold fluid or air which then falls.

an oven having a fan that circulates hot air uniformly and continuously around food

The transfer of heat from your body caused by the movement of air around you.

bodily movement of material from one place (usually hotter) to another (usually colder). Often in sub-circular patterns called "convection cells".

The mass motion within a fluid, resulting in the transport and mixing of the properties of that fluid. This could be the transport of heat and/or moisture. It is often used to imply only upward vertical motion and then it is the opposite of subsidence.

The motion resulting in a fluid from the differences in density. In heat transmission, this meaning has been extended to include both forced and natural motion or circulation.

The organized flow of large groups of molecules based on their relative densities or temperatures. A hot fluid or gas will move upward, and a cooler liquid or gas will sink downward.. ( go to first use in the text)

Advection is transport by mass flow of a medium; for example, water. Convection describes bulk water transport (i.e., flux) through porous media. Diffusion is the net transport of solutes within the liquid, solid or gas phase resulting from random (Brownian) motion of individual molecules in response to a concentration or other gradient.

the dispersion of heat by air currents

motion in a fluid in which the warmer portions rise and the colder portions sink

the transfer of heat by a large-scale displacement of groups of molecules with relatively higher kinetic energy. Molecules with higher kinetic energy are moved from one place to another. The heat rises and the cold moves under in a circular pattern. Coordination Compound or Complex: a compound containing coordinate covalent bonds

A meteorological term meaning a rapid upward movement of air that occurs through the strong heating of the Earth’s surface and supportive atmosphere instability. Winds and currents are mainly driven by convection in the atmosphere and in the oceans

transfer of heat energy through the movement of a fluid

The transfer of heat through a liquid or gas by the actual movement of the molecules.

Heat transfer through the movement of a fluid, eg: warm air rising.

The mechanism for transfer of heat from a solid surface (such as a component) to a surrounding fluid (usually air). Natural convection is heat transfer to ‘still’ air; forced convection involves heat transfer to air that is moved by artificial means such as a fan.

The process generally associated with warm rising air and the formation of cloud. Local breezes, wind and thunderstorms are a result of convection in the atmosphere.

The circulating masses of material driven by temperature-induced density differences; material heated at depth rises, spreads laterally, then cools and sinks to depths where it is heated again.

movement of a fluid with heat transport under the influence of temperature differences

the up and down air motions caused by heat which is capable of generating clouds and precipitation

transmission of heat by moving heated gases. In a hot-air furnace the heated air rises and cooler, heavier air falls.

Air naturally circulated by differences in temperature. Colder, denser air falls and displaces the lighter, warm air.

A METHOD BY WHICH HEAT IS TRANSFERRED WHERE THERE IS A DIFFERENCE IN THE DENSITY OF THE AIR GAP BETWEEN THE SHEETS OF GLASS IN AN INSULATED GLASS UNIT AND WHERE GRAVITY INTERACTS WITH IT. THIS SAME EFFECT ALSO AFFECTS HEAT TRANSFER FROM THE GLASS SURFACE TO THE AIR IN THE ROOM.

process in which energy is transferred from one point to another point by currents in a gas or liquid moving in a closed loop.

process of heat transfer that is accomplished by a movement of mass

con-veck-shun A way that heat travels through liquids and gases

Describes the vertical air motion that occur when the atmosphere is unstable. Convection often gives rise to the formation of convective cloud (Cumulus, Towering Cumulus and Thunderclouds) and showery precipitation.

The transfer of heat by movement of hot air. Often used in conjunction with infrared radiation to reduce the effect of IR shadowing.

heat transfer between a surface and an adjacent fluid medium (usually air or water) as well as by fluid displacement   Konvektion

The transfer of heat through a moving gas (air) and a surface, or the transfer of heat from one point to another within a gas. In hydronic heating, cool air falls to the floor where it is heated by metal fins in a baseboard radiator and then rises to transfer heat to the environment through natural convection.

The transport of energy by fluid motions occurring in gases, in liquids, or in semi rigid material such as the earth's mantle. These motions are usually driven by the buoyancy of heated material, which tends to rise while cooler material descends. A to F | G to L | M to R | S to Z

Mass movement of a fluid resulting in heat transfer. The heated part expands and rises, cooler material flows in to take its place, and a convection current is established.

Transfer of heat by the movement of molecules in a gas or liquid with the less dense fluid rising. The majority of heat transfer in a fire is by convection.

Transmission of energy (heat /sound) from one place to another by movement of a fluid such as air or water.

One of the three possible modes of heat transfer (the others are conduction and radiation), this refers to heat transfer when a moving fluid (can be liquid or gas) is present; the heat is transferred by the bulk motion of the fluid.

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

the transferring of heat in a liquid of gas, due to lighter parts rising and denser parts sinking.

atmospheric motions that are predominantly vertical, such as rising air currents produced by surface heating. Forced convection happens when air is forced to rise by something, such as an advancing cold front or mountains. Free convection is the rising of heated air and the sinking of cooler air without the need of external forces.

Transmission of energy or mass in a medium by movement of the medium itself.

Heat transfer process in which heat is transferred from a fluid part to another by the movement of the own fluid. The convection can be natural (density) or forced (mechanical agitation).

The motion of fluid such as gas or liquid by which heat may be transported.

Vertical air circulation where warm air rises and cool air sinks.

A means by which heat is transferred between a solid surface and a fluid such as air and water.

the transfer of heat by movement of fluid or air

Heat transferred by currents that flow from a warm surface to a colder surface.

The transfer of heat from place to place by the circulation of a gas or a liquid.

The transfer of heat energy through a moving liquid or gas. Energy

The transfer of heat energy through a liquid or gas due to the motion of that liquid or gas.

the transfer of heat as a result of the mixing of a liquid or a gas

Mass motions in a field resulting in transport and mixing of the field. More specifically, it refers to motion associated with a rising current of air.

The transfer of heat by the movement of heated liquid or gas. Vertical rising of heat energy (heat convection) in the atmosphere occurs when a shallow layer of air in contact with a hot surface warms up, becomes more buoyant (warmer air is less dense than colder air), and rises, taking with it the energy that it has stored.

A PROCESS WHEREBY AIR BECOMES BUOYANT RELATIVE TO ITS SURROUNDINGS AND BEGINS TO RISE IN A CONCENTRATED COLUMN - WHILE THE SURROUNDINGS SUBSIDE OVER A MUCH LARGER AREA. THE TERM IS OFTEN USED TO DESCRIBE THE OCCURENCE OF DEEP CUMULUS CONVECTION IN THE TROPICAL OCEANS.

When unequal temperatures affect a current, thermal energy is transferred. This commonly refers to convection in a gas or liquid.

The process of energy transfer through fluids or between fluids and solid bodies.

the upward motion of a mass of air that has been heated. Convection is the primary way that heat is transferred in the atmosphere. It is the process by which warm air rises up from the ground, to be replaced by cold air. The cold air is then warmed and cycles upward.

Heat transfer from one place to another using a fluid.

The circulatory motion that occurs in a fluid at a nonuniform temperature because of the variation of its density and the action of gravity.

Vertical atmospheric motions intiated or sustained by buoyancy forces

The transfer of energy (heat) by molecular motion in a liquid or a gas.

The transfer of heat by the movement of mass or substance. This only occurs in fluids. This often refers to the vertical motion of air in a thunderstorm.

the transfer of heat within a gas or liquid by their movement.

Motion in a fluid or plastic material due to some parts being buoyant because of their higher temperature. Convection is a means of transferring heat through mass flow rather than through simple thermal conduction.

Heat can be transferred by convection. This occurs when warm liquid or gas rises, and creates convection currents. Convection

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.

The transfer of heat by the physical motion of masses of fluid.

transfer of energy in fluid motion.

Heat transfer through the atmosphere by a difference in force or air pressure is one type of air transport. Sometimes referred to as the "stack effect," hotter less dense air will rise, colder dense air will fall creating movement of air within a building.

heat transport by bulk motion of material: occurs where radiation cannot transport heat away rapidly enough to maintain stability (i.e. in conditions where temperature gradients are large).

The transmission of heat by the circulation of air.

transference of heat by moving currents of heated liquids of gasses as in a sauna to increase body temperature

A mode of heat transfer in a fluid (gas or liquid) in which heat is transferred through movement of masses of the fluid from a region of higher temperature to one of lower temperature. Back to the top

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.

Heat transfer within a fluid by the movement of heated molecules from one place to another.

the transfer of heat to or from a solid surface via a gas or liquid current. Where home heat loss and gain are concerned, heat convection is caused by air (gas) currents that carry heat from your body, furniture, interior walls and other warm objects to windows, floors, ceilings, exterior walls and other cool surfaces. Energy Services Energy Systems/Technologies

the transfer of heat by movement within a fluid such as a liquid or a gas

The transfer of heat by the physical movement of molecules from one place to another. Hot air rises and heated water thermosiphons. Through convection a tank of water heated from a single source will advance towards reaching an even temperature throughout its mass.

Warm air rising or cold air sinking or both.

A method of transferring heat by the actual movement of heated molecules, usually by a freestanding unit such as a furnace.

The transfer of heat by air currents (example: gravity hot air furnace).

A transfer of heat that occurs when a fluid flows inside a channel of a different temperature; heat is transferred through the fluid because of the difference in motion between it and the flow boundary.

Convection is the transfer of heat in fluid or air, caused by the movement of the heated air or fluid itself. In a building space, warm air rises and cold air settles to create a convection loop and is termed free convection. Convection can also be caused mechanically by a fan and is termed forced convection.

transfer of energy and mass by motions in a liquid or gas. In the atmosphere, convection usually refers to the vertical interchange of air masses. An example of convection is the rising of warm surface air and the sinking of cold air from upper levels of the atmosphere.

The movement of heat by air flow.

The transfer of heat by the movement of a gas or liquid; convection, conduction, and radiation are the principal means of energy transfer. As specialized in meteorology, atmospheric motions that are predominantly vertical in the absence of wind (which distinguishes this process from advection), resulting in vertical transport and mixing of atmospheric properties.

Heat transfer between two objects, one of which is either a liquid or a gas. During convection, the pull of gravity initiates fluid circulation, causing heated molecules to rise and cool molecules to fall.

Transfer of heat by the movement of the heated material. In meteorology, the up and down air motions caused by heat.

The transfer of heat by physical movement of a heated medium from one place to another. The convective column of a wildland fire can provide the medium.

The vertical movement of heat by massive motion within the atmosphere.

A circulating flow in a fluid, carrying heat away from its source. Convection in the atmosphere carries heat from the sun-warmed ground to higher layers, where it is radiated away into space; the lower levels do not radiate efficiently because of the greenhouse effect. Atmospheric convection is the engine that drives the Earth's weather. Convection is also believed to occur in a certain depth range below the Sun's surface, helping carry away heat from the Sun's core region.

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.

Transfer of heat by moving molecules. The example used is heated water moving.

Churning motion resulting from the constant upwelling of warm fluid and the concurrent downward flow of cooler material to take its place.

Heat transfer from a solid into a liquid or gas.  The energy transferred through the heat sink leaves via convection to air or water.  Convection increases with increasing temperature differential, increasing surface area, and increasing convection coefficient.

The flow of heat through a circulating gas or liquid, such as the air in a room or the air or gas between window-panes.

Heat transfer by circulation within a medium, such as a gas or a liquid.

A process by which heat is distributed in the troposphere. Rising parcels of warm air, less dense than their colder surroundings, transport heat vertically.

Heat transfer by the movement of fluid or air.

Heat transfer occurring due to temperature difference.

The transfer of thermal energy in a gas or liquid by currents resulting from unequal temperatures.

In meteorology, this term is used most often to describe the vertical transport of heat and moisture, especially by updrafts and downdrafts in unstable air. Showers and thunderstorms are forms of convection.

the transfer of heat energy by moving currents of material

The transmission of heat by air. Heated air rises and circulates.

The mass movement of warmed air or liquid to or from the surface of a body or object.

A vertical motion of air. The transfer of energy by mixing a fluid.

in general, the transport and mixing of the properties of a fluid (e.g., heat, moisture, etc.) by means of mass motion within the fluid; in meteorology, atmospheric motions generally are divided into those in the horizontal, or advection, and those in the vertical, or convection; convection typically results from surface heating and the subsequent rising of warm air

generally refers to vertical motion in the atmosphere or ocean generated by temperature difference and resulting in the transfer of heat.

the transportation of heat from one place to another by the movement of a liquid or gas (A classroom is warmed by a hot air blower due to convection.)

fluid circulation in a fluid that occurs because of differences of heat.

Heat energy travels through a fluid (a liquid or a gas) by convection.

The transfer of heat through the physical movement of heated matter.

A heat transfer mode that occurs at the interface between a solid surface and surrounding still air.

A cooking method in which a fan continuously circulates heated air in the oven cavity while foods are cooking. May have a third heating element around the fan. D - G

The heating of the air that passes over a hot surface.

This is the transfer of heat through a liquid or a gas when molecules of the liquid or gas move and carry the heat.

The transfer of by movement of the heated material. In meteorology, it is often used to indicate the vertical movement of warm air (as opposed to advection, the horizontal movement).

a type of movement in a gas or liquid that carries heat toward a cooler location. When the gas or liquid cools, it sinks back down again.

The circulatory motion that occurs at nonuniform temperatures due to gravity and density variation, resulting in the transfer of heat.

The direction of heat as is flows through gas or liquid.

the transfer of energy by the flow of a liquid or a gas

Bulk flow of plasma across magnetic field lines, resulting in circulation of plasma through the magnetosphere.

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.

The transfer and distribution of heat by fluid or gas, an alternative to infrared.

The movement heat by currents in liquids or gases.

The transfer of heat or moisture in a medium by the movement of a mass or substance. When used to imply only upward vertical motion, it is then the opposite of subsidence.

Transfer of heat by air currents, i.e., gravity, hot air furnace.

It is the transfer of heat by the substance moving en bloc. Heated substance (gas or liquid) loses density and therefore rises (moves) to cooler region in the substance. Heated substance looses density, therefore moves from hot region to cooler region and colder substance (with higher density) move to towards the source of heat. Hence a convection current is set up.

The transfer of heat from one part of a fluid or gas to another, carried out by the movement of molecules in the substance. (TOP OF THE PAGE) (CLOSE WINDOW)

A heat transfer process involving motion in a fluid (such as air) caused by the difference in density of the fluid and the action of gravity. Convection affects heat transfer from the glass surface to room air, and between two panes of glass.

Mass motions with a fluid (liquid or gas) resulting in transport and mixing of the components of that fluid. Thermal convection results from temperature differences within the fluid.

A transfer of heat by movement of air.

Currents created by heating air, which then rises and pulls in cooler air

Transferring heat by moving air, or transferring heat by means of upward motion of particles of liquid or gas heat from beneath. Heat transfer by the movement of fluid.

the bulk transport of heat in a fluid by mixing. In meterology, convection is often used in reference to vertical air movement.

The Sun heats the ground causing air currents to rise rapidly - this action Is normally followed by thunderstorms.

Atmospheric motions that are predominately vertical, resulting in the vertical transport and mixing of atmospheric properties.

the transfer of heat that occurs due to the circulation of hot air.

Heat transfer by currents that flow from a warm surface to a colder one.

The transfer of heat from one point to another in a fluid by mixing one portion of the fluid with another. Natural convection is caused by density variations due to temperature differences. Forced convection is the motion produced by mechanical means.

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 process of heat transfer whereby heat energy is transferred from one location to another -- created by the motion of air resulting from a difference in temperature and the action of gravity.

Process by which, in a fluid being heated, the warmer part of the mass will rise and the cooler portions sink. This is also a a component of the theory for continental drift, in that the circulating movements of crustal materials push the continents apart. [Journal of the Atmospheric Sciences. v 46, 1540, 1989.] [Journal of the Atmospheric Sciences. v 45, 2641, 1988.

the circulatory motion that occurs in fluids due to differences in temperature, which cause variations in density.

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.

Heat transfer by the movement of liquid and gases.

Circulation of a fluid or gas.

modality of heat propagation in fluids, by displacement of masses of fluid matter.

Energy and/or mass trasfer in a fluid by means of bulk motion of the fluid. (e.g. heating water on the stove causes the hotter water on the bottom to rise, mixing with the cooler water on top.)

to move heat from one place to another

A transfer of heat within a fluid by fluid motions. Meteorologists refer to vertical motions as convective. Horizontal motions are advective. Also used to denote the presence of cumulus clouds (also known as convective clouds); most often refers to instability.

Usually means thunderstorms or showers created by daytime heating.

The transfer of heat energy by air or fluid movement. This motion is a spontaneous circulation due to the combined actions of gravity and changes in air or fluid density. In space heating, the operation of a baseboard heater is a good example of convection.

The transmission of heat via fluids or gas. As these are warned they they rise and are replaced by cooler substances.

Fluid circulation driven by temperature gradients; the transfer of heat by this automatic circulation (see also Educator's Guide to Convection).

Transfer of heat in a moving fluid. Air flowing past the body can cool the body if the air temperature is cool. On the other hand, air that exceeds 35°C (95°F) can increase the heat load on the body.

The transfer of heat or mass by large-scale fluid movements. When the process occurs, due to density and temperature differences, it is termed natural convection. When the process occurs due to external devices (such as fans), it is termed forced convection.

The transfer of heat from a region of high temperature to a region of lower temperature by the displacement of the cooler molecules by the warmer molecules.

Way that heat moves that involves the molecules moving and bringing the heat energy with them (p.143-144).

the transfer of energy (in liquids and gases) by currents due to a difference in densities of substances at different temperatures.

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. 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.

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

The transfer of energy through a liquid or gas due to the motion of the medium.

Atmospheric motions in the vertical direction resulting from surface heating and the subsequent rising of warm air. This lifting mechanism is capable of generating the rising motions necessary for clouds and precipitation to form.

The transfer of heat through a fluid by circulating currents.

Heat transfer from one place to another by actual motion of the hot material. The transfer of heat by circulation currents in liquids and gases. See law of heat flow.

The movement of matter due to changes in temperature and therefore density. Warm material rises because it is less dense (lighter) and cool material sinks because it is more dense (heavier). Image of Granules. These features are the tops of convection cells on the Sun where hot fluid rises up from the interior in the bright areas, spreads out across the surface, cools and then sinks inward along the dark lanes. Individual granules last for only about 20 minutes. Each granule is about the size of Texas. Image from the Swedish Vacuum Solar Telescope.

A circular, vertical flow of a fluid medium by heating, from below; as materials are heated, they become less dense and rise, cool down, become more dense, and sink [LCOTE

Transfer of heat by flow of liquids or gases. In meteorology, atmospheric motions that are predominantly vertical because of heating at the surface.

The transfer of energy by moving currents in gases or liquid. Partly responsible for the transfer of heat from the interior of the Sun to the photosphere.

The process of heat transfer through fluids by means of rising currents.

The movement or circulation of a fluid due to variations in its density as a result of the transfer of heat within the fluid.

Heat transfer via the mass movement of molecules.

Convection is the internal movement of currents within fluids (i.e. liquids and gases). It cannot occur in solids due to the particles not being able to flow freely. The most common cause of internal movement is a variation in density due to a transfer of heat.