[time-nuts] Thunderbolt stability and ambient temperature
jfor at quik.com
Fri Jun 12 01:09:05 UTC 2009
The effect that was described was absolutely NOT a result of thermal
conductivity being a function of temperature.
It was a dynamic effect... a transient condition. The result of applying a
short heat pulse to a long Time Constant, distributed system.
Do the simulation I suggested hours ago.
>> The thermal conductivity isnt constant with temperature.
>> It also varies between different crystalline forms of the same material.
>> This can be seen in more comprehensive tables of thermal conductivity.
>> In particular at cryogenic temperatures the thermal conductivity can
>> change dramatically (eg in superconductors)
> Excellent. Not constant; and perhaps not even linear?
> If you run across a thermal conductivity table for steel
> from say 0 to 1000 C let us know. From that graph we
> should be able to calculate what Rex felt when he put the
> red hot (1500 F?) end of the 1 inch bar into cold water.
> Better yet, if some metal or material has an even more
> pronounced thermal conductivity function it would make
> a great party trick.
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