ARTICLE:

• THERMAL RESISTANCE DUE TO SUB-MEAN FREE PATH CONSTRICTIONS  download article

S. Volz
Laboratoire d'Energétique Moléculaire et Macroscopique, Combustion, CNRS UPR 288, Ecole Centrale Paris, Grande Voie des Vignes, F-92295 Châtenay-Malabry cedex, France

P.-O. Chapuis
Laboratoire d'Energétique Moléculaire et Macroscopique, Combustion, CNRS UPR 288, Ecole Centrale Paris, Grande Voie des Vignes, F-92295 Châtenay-Malabry cedex, France

ABSTRACT

We solve the ballistic-diffusive heat conduction equation to calculate the heat flux generated by a hot disk on a surface. The disk diameter is on the order of the phonon mean free path in the material. The thermal conductance between the hot disk and the semi-infinite body is ten times smaller than the one predicted by Fourier's Law when the disk diameter is equal to one half of the mean free path.

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