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Tuesday, May 24, 2016

Temperature... Feels Hot

From the post "Add By Subtracting..." dated 23 May 2016,

pVT=T+τo.VAo=T+τo.12rhr+h

the problem with this expression is that the variation of pVT is dependent on the geometry of the experimental setup from which VAo is derived.  In this case, a volume confined in a cylinder of base 2πr and variable height h.

This aside, from the same post above,

pd=TE=ρTτo=Tn.TEp

TEp=TAoτo

due to the distribution of Tn on the inner surface of the containment, could be the temperature that we commonly measure.  This distribution of Tn particles on the side the containment or any body in thermal contact with another body of unequal temperature potential is the result of a flow of temperature particles.  Flow stops when,

pd1=pd2

Tn1.TEp1=Tn2.TEp2

where it is possible that Tn1Tn2 and TEp1TEp2

This is different from electric potential difference that drive the electric current across similar conductor.

This explanation allows for two bodies of different materials in thermal contact to have different temperatures, but no temperature particles flow between them.  One body is insulating the other hot body.

TEp is specific to a material and depended on the material lattice, τ a material constant and the availability of T, Tn inside the material.

This at last is temperature.

Note:  If pd1=pd2 is the case, then it is possible to push temperature particles from an insulator to a body and have the latter attain a higher temperature.