[time-nuts] Thunderbolt stability and ambient temperature
bruce.griffiths at xtra.co.nz
Wed Jun 10 23:45:19 EDT 2009
Hal Murray wrote:
> phk at phk.freebsd.dk said:
>>> Can I get reflections without some inductance?
>>> Is there any inductance in a system of alternating
>>> layers of insulation/storage?
>> I think you are overstretching the badly chosen nomenclatures
>> parallels to electricity.
> It was actually a (somewhat?) serious question on several grounds.
> Can I get reflections from a lumped circuit model of a transmission line made
> out of just Rs and Cs? If so, I can probably do the same in the thermal
> Can I get reflections in a thermal context? Bruce's URLs say yes, but my
> math is rusty enough that I can't quickly understand what's going on.
> If a thermal problem can generate reflections, does that mean it also has
> something corresponding to inductance? If so, what is it?
> It's possible that the key idea is time-delay. In the electrical world, a
> delay is a transmission line which has both C and L. I'm not sure what the
> one-dimensional equivalent in the thermal world is.
> What's the speed-of-light equivalent in the thermal world?
When heat transport via convection occurs there may be something akin to
Thermal mutual inductance:
Thermal inductance: http://adsabs.harvard.edu/full/1963AuJPh..16..353B
The term thermal inductnace also occurs in Tokamak literature as well as
in the the application of Josephson Junctions.
However the meaning differs from the convection case.
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