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  1. 1 Open Physics

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  1. 1 2006

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  1. 1 Konstantinov V.

  2. 1 Pursky O.

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Translation-rotation coupling and heat transfer in orientationally-disordered phase of CCl4

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Pursky O., Konstantinov V.
Open Physics
|
2006
|
vol. 4
|
issue 2
210-222
EN
The isochoric thermal conductivity of an orientationally-disordered phase of CCl4 is analysed within a model in which heat is transferred by phonons and above the phonon mobility edge by ”diffusive” modes migrating randomly from site to site. The mobility edge ω0 is found from the condition that the phonon mean-free path cannot become smaller than half the phonon wavelength. The contributions of phonon-phonon, one-, and two-phonon scattering to the total thermal resistance of solid CCl4 are calcualted under the assumption that the different scattering mechanisms contribute additively. An increase in the isochoric thermal conductivity with temperature is explained by suppression of phonon scattering at rotational excitations due to a decrease in correlation in the rotation of neighbouring molecules.
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