Record down under

RenewableCandy · Post by **RenewableCandy** » 02 Mar 2013, 14:33

No because Convection removes the heat by removing the object holding it (e.g. a parcel of air near a warm object) whereas in Conduction, only the heat moves, not the object.

But yes I suppose Convection wouldn't start before some Conduction had happened...

Little John · Post by **Little John** » 02 Mar 2013, 15:18

RenewableCandy wrote:No because Convection removes the heat by removing the object holding it (e.g. a parcel of air near a warm object) whereas in Conduction, only the heat moves, not the object.

But yes I suppose Convection wouldn't start before some Conduction had happened...

Yep, I can see what you are saying. In which case, with cold air moving over ice, it is initially conduction (thermal energy moves from ice to air) followed by convection (slightly warmed air is carried away)

woodburner · Post by **woodburner** » 03 Mar 2013, 01:44

It may be that the term "wind chill" is used exclusively to describe the subjective feeling of getting colder in humans.

I think you have it.

http://en.wikipedia.org/wiki/Wind_chill

Wind chill (popularly wind chill factor) is the perceived decrease in air temperature felt by the body on exposed skin due to the flow of cold air.

RenewableCandy · Post by **RenewableCandy** » 03 Mar 2013, 21:50

But there must be a name for the effect that Steve's describing...I mean, the heat loss from an inanimate object will be greater if the fluid next to it is moving and carrying the heat away.

Post by **kenneal - lagger** » 04 Mar 2013, 03:46

RenewableCandy wrote:But there must be a name for the effect that Steve's describing...I mean, the heat loss from an inanimate object will be greater if the fluid next to it is moving and carrying the heat away.

Arctic Ice loss?

Oh no! That's the other way round; the fluid next to it is moving and carrying the heat to it.