1. 5/7/13 What is convection and what are some applications of convection? - Yahoo! UK & Ireland Answers
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Other Answers (4)
What is convection and what are some applications of convection?
5 years ago ( 2008-06-05 22:04:33 +0000 ) Report Abuse
Opj
Best Answer - Chosen by Asker
Convection is one method of transferring heat energy via a fluid medium (one that is free to move like a liquid of gas)
eg. radiator in a room.
At hot radiator, air is heated and thus expands (since molecules gain energy and thrash about more, taking more
space).
The density of warm air decreases, so it rises to the ceiling. (If you jump up and down in a steamy kitchen you can
actually tell)
The space occupied before by the warm air is replaced by cold air. thus the warm air is displaced and moves across
the room.
The warm air loses energy, becomes more dense and sinks.
The air that replaced the warm air before has now warmed up and risen, so the convection current begins again as
the original batch of air goes back to the radiator to be heated up.
5 years ago ( 2008-06-05 22:16:45 +0000 ) Report Abuse
Asker's Rating:
thanks. right on!!!!!!!!
UTATS
Convection is where heat is transferred by a moving fluid.
For example, if it is a hot day and you turn on the fan, the moving air cools you down. Convection is a more efficient
method of transfering heat. It is because you are continuously replacing the molecule in the fluid next to the surface
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2. 5/7/13 What is convection and what are some applications of convection? - Yahoo! UK & Ireland Answers
uk.answers.yahoo.com/question/index?qid=20080605150433AAolLpw 2/2
you wish to cool.
As the previous Answerer noted, a convection oven work by using a fan to move the air around. Radiators establish
their own convection flow. Hot air rises and is replaced by colder air which in turn heats up.
5 years ago ( 2008-06-05 22:16:25 +0000 ) Report Abuse
Frst Grade Rocks! Ω
snoopy_rules has described natural convection well. If you use a fan or pump it's "forced convection".
Every time you boil a kettle, you're using natural convection: water is such a poor conductor that only water next the
heat source would boil, if convection didn't spread the heat through the kettle.
Old-fashioned house hot-water systems used natural convection to get the heat from the boiler to the hot-water tank,
but they therefore required large pipes; modern ones use a pump to force water through smaller pipes - convenient
but more complex.
5 years ago ( 2008-06-05 22:51:15 +0000 ) Report Abuse
James P
Radiators have a degree of convection.
Look on the back of your radiator at home, the fins on the back aid convection (the heat that convects, rises up and
along the ceiling and back down the far wall)
An oven, uses convection, where as the grill is a radiant heat.
Convected heat is the hot air moving because its lighter than the cooler air.
There is no convected heat in space - there is no air.
5 years ago ( 2008-06-05 22:09:25 +0000 ) Report Abuse
Acka
Convection is the transfer of heat by the actual movement of the warmed matter, A convection oven circulates hot air
to bake cakes
5 years ago ( 2008-06-05 22:13:45 +0000 ) Report AbuseBobbys_l...