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At 18:47 26 04 2000 , you wrote:not
THE POT GETS HOTTER THAN THE STOVE
When you heat soup on the stove, you don't expect it to get hotter
than the burner because heat normally flows from hot regions to cold
ones.
As some of us have being trying to point out for years now, "heat" does
"flow". This phenomenon is not so counterintuitive if that fact isremembered.
But now, in the 1 May PRL, a team using an experiment on the
Russian space station MIR has shown otherwise: For a fluid
consisting of liquid and gas phases on the verge of a transition,
the gas temperature can exceed that of its surrounding heat source,
a condition known as local overheating. This counterintuitive effect
was predicted theoretically a decade ago and demonstrates the
complex nature of heat transfer in fluids.
Again if we want to understand new phenomena, we should stop using caloric
thinking: "heat" is not a substance which is "transferred". Resist
correct thinking if you will, but you risk missing some of the
physics. This is a case in point.
(R. Wunenburger et al., Phys. Rev. Lett. 84, 4100.
COMPLETE Focus story at http://focus.aps.org/v5/st18.html
Link to the paper: http://publish.aps.org/abstract/PRL/v84/p4100/)
Forwarded to the list by
Bob Sciamanda (W3NLV)
Physics, Edinboro Univ of PA (em)
trebor@velocity.net
www.velocity.net/~trebor
Jim Green
mailto:JMGreen@sisna.com
http://users.sisna.com/jmgreen