[time-nuts] Thunderbolt stability and ambient temperature

J. Forster jfor at quik.com
Thu Jun 11 21:09:05 EDT 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.

-John

==============


>> Tom
>>
>> 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)
>>
>> Bruce
>
> 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.
>
> /tvb
>
>
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