convection

Definitions

  • WordNet 3.6
    • n convection the transfer of heat through a fluid (liquid or gas) caused by molecular motion
    • n convection (meteorology) the vertical movement of heat or other properties by massive motion within the atmosphere
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Webster's Revised Unabridged Dictionary
    • Convection (Physics) 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. "Liquids are generally heated by convection when heat is applied from below."
    • Convection The act or process of conveying or transmitting.
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Century Dictionary and Cyclopedia
    • n convection The act of carrying or conveying; specifically, the transference of heat or electricity through the change of position of the heated or electrified body: distinguished from conduction (which see). When a portion of a liquid or a gas is heated above the temperature of surrounding portions, it increases in volume, and, thus becoming specifically lighter, rises, while the cooler portions of the fluid rush in from the sides and descend from the upper parts of the vessel. Convection currents are thus produced, and the liquid or gas is soon heated throughout. This principle is used in heating a house by a hot-air furnace. The Gulf Stream is a grand convection current, carrying the heat of the equator toward the pole. (See heat.) Similarly, electricity may be transmitted by convection by the motion of the electrified body itself, as when the electricity of a conductor is discharged by a point, it being carried off by a stream of electrified air-particles.
    • n convection by liberation of the latent heat of evaporation which remains with the aqueous vapor contained in the air until it is liberated by condensation into cloud. In so far as the liberated heat remains in the cloud, it may be consumed in reëvaporating the cloudy particles or be lost by radiation; in so far as it is brought down to the earth with the rain or snow, it affects the local climate powerfully.
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Chambers's Twentieth Century Dictionary
    • n Convection kon-vek′shun the process of transmission of heat or electricity through liquids or gases by means of currents
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Etymology

Webster's Revised Unabridged Dictionary
L. convectio, fr. convehere, to bring together; con-, + vehere, to carry
Chambers's Twentieth Century Dictionary
L.,—con, and vehĕre, to carry.

Usage

In literature:

Convection is responsible for winds and ocean currents, for land and sea breezes, and other daily phenomena.
"General Science" by Bertha M. Clark
Sedimentation from this point of view is a convection of energy.
"The Birth-Time of the World and Other Scientific Essays" by J. (John) Joly
There must have been some convection current in the ancient ocean that had swirled them all into this one place.
"Little Fuzzy" by Henry Beam Piper
Thermal convections; air starts to cool when it gets dark, and then heats up again in double-sun daylight.
"Oomphel in the Sky" by Henry Beam Piper
We'll be cooled by conduction and convection.
"Islands of Space" by John W Campbell
Does the heat reach the hand by convection?
"Ontario Teachers' Manuals: Nature Study" by Ontario Ministry of Education
AIR CARRIES HEAT BY CONVECTION.
"Common Science" by Carleton W. Washburne
The escape of heat from a cooling mass is effected by conduction, or by convection, or by both.
"Essays: Scientific, Political, & Speculative, Vol. I" by Herbert Spencer
Gerdien's estimate of the convection current is for fine weather conditions.
"Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 8" by Various
The tube C is a connecting tube bent downwards so as to prevent the mixing of the solutions by convection currents.
"The Phase Rule and Its Applications" by Alexander Findlay
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In poetry:

The mounted disk of ebonite
Has whirled before, nor whirled in vain;
Rowland of Troy, that doughty knight,
Convection currents did obtain
In such a disk, of power to wheedle,
From its loved North the subtle needle.
"Answer To Tait" by James Clerk Maxwell

In news:

Vulcan PowerSteam™ Series Countertop Convection Steamers Vulcan's innovative PowerSteam™ enables higher production in a smaller footprint and requires less labor.
Suddenly flawed Falcons part of an imperfection convection .
IFR Strategies In Convective Weather.
New convective wx tool goes online.
The second time I made this, I used the convection feature on my oven, and that is the way to go.
(Convection oven to 425 degrees) Rinse and pat dry the scallops.
A moon rock brought back by astronauts from the last Apollo mission in 1972 has finally proven its worth by revealing that the moon used to have a hot, convecting molten core that generated a magnetic field.
Most radiators use a combination of convection and radiation to heat their surroundings.
Cooks can operate the units in any one of the three operating modes— steam , convection or steam plus convection.
The fun continues with today's giveaway of an awesome West Bend Convection Toaster Oven .
New 2011 Roadtrek 210-SS- Agile $95,360 Roadtrek Class B Coach w/Rear Electric Power Sofa & Table Converts to Twin-Like Beds or King Size Bed, Convection Microwave Oven, Opt.
Convection heat doesn't dry the air as much as a woodstove.
If you are making a long cooked roast make a pile on one side of the grill (and cook the meat on the other — you'll form a natural convection oven).
Heat oven to 350°F (convection oven to 325°F).
Disorganized Convection in the E. Atlantic remains unsettled but no development is likely & -- if so -- would stay in the E. Another coastal low.
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In science:

Mc ≡ 4πR2 (yb - yc ) is the mass of the convection zone.
Rotational Evolution During Type I X-Ray Bursts
The lower panels of Figure 2 show ∆Ω/Ω(y) ≡ (Ω⋆ Ω(y))/Ω⋆ as a function of column depth for the different convective models in Table 3.
Rotational Evolution During Type I X-Ray Bursts
As we described above, in radiative zones the spin down depends on height, whereas convective zones are rigidly rotating.
Rotational Evolution During Type I X-Ray Bursts
For both convective and fully-radiative models, the ∆Ω/Ω(y) is smaller by roughly a factor of two for pure He ignition as opposed to mixed H/He ignition.
Rotational Evolution During Type I X-Ray Bursts
We compute simple models of convective for the whole duration of the burst.
Rotational Evolution During Type I X-Ray Bursts
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