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Air heated by a space heater rises and is replaced by cool air, creating a convection current that circulates hot air throughout a room.


1. The act or process of conveying; transmission.
2. Physics
a. Heat transfer in a gas or liquid by the circulation of currents from one region to another.
b. Fluid motion caused by an external force such as gravity.
3. Meteorology The transfer of heat or other atmospheric properties by massive motion within the atmosphere, especially by such motion directed upward.

[Late Latin convectiō, convectiōn-, from convectus, past participle of convehere, to carry together : Latin com-, com- + Latin vehere, to carry; see wegh- in Indo-European roots.]

con·vec′tion·al adj.
con·vec′tive adj.
con·vec′tive·ly adv.
References in periodicals archive ?
Forecasters expect the convective clouds associated with rainfall to form again over the same area on Tuesday afternoon.
The weather is expected to be partly cloudy with some convective clouds and rainfall during morning times, especially over the northern and eastern areas.
Models showed that mesoscale convective systems increased throughout North America, but particularly in northeastern and mid-Atlantic states.
They found that the surface of this red giant has just a few convective cells, or granules, that are each about 120 million kilometres across about a quarter of the stars diameter 2 .
Weather watchers said the latest satellite imagery and weather chart analysis show the existence of scattered convective clouds associated with the tropical storm (OCKHI) south east of the Arabian Sea.
Ordinarily, the convective heat transfer from the cylinder gases to the walls is calculated by estimating the engine-wall temperature and basing the heat flux on the difference between the gas and wall temperatures.
Radar data is the most helpful tool for identifying convective shear conditions.
But stars smaller than about 35% the Sun's mass--including Proxima Cen--are convective the whole way through.
Among their topics are governing equations, steady natural and mixed convection flow in viscous fluids over a wavy vertical wall, forced convective flow in a wavy horizontal channel, natural convection flow saturated with nanoparticles in wavy-walled cavities and in wavy-walled porous cavities.
The research team, which also included scientists from NASA's Jet Propulsion Laboratory and the University of Colorado, Boulder, analyzed data from 2,430 convective cloud systems and found that the amount of aerosols in the air could account for around 20 percent of the variability in a cloud system's lifetime over South Asia and Latin America.
Convective heat transfer coefficients under different drying conditions