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Updated: Jan 10, 2026

Characterization of Thermal Transport in One-dimensional Solid Materials
Published on: January 26, 2014
The Knudsen Layer in the Heat Transport Beyond the Fourier Law: Application to the Wave Propagation at Nanoscale
Isabella Carlomagno1, Antonio Sellitto1
1Department of Industrial Engineering, University of Salerno, 84084 Fisciano, Italy.
Abstract:
In agreement with the second law of thermodynamics, a new theoretical model for the description of the heat transfer at nanoscale in a rigid body is derived. The model introduces the concept of the Knudsen layer into non-equilibrium thermodynamics in order to better investigate how phonon-boundary scattering may influence the heat propagation at nanoscale. This paper, in particular, deepens the influence of the Knudsen layer on the speed of propagation of thermal waves.
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