John That doesn't appear to reproduce what was claimed to have been observed at all. The input is more like a step function that switches from hot to cold. This allows the simulated bar to reach a steady state temperature distribution before decaying smoothly to a lower temperature.
Bruce J. Forster wrote: > 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 >> >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> >> >> > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.