학술논문
Size effects on heat transport in small systems: Dynamical phase transition from diffusive to ballistic regime.
Document Type
Article
Author
Source
Subject
*PHASE transitions
*HEAT conduction
*TRANSPORT theory
*THERMODYNAMICS
*MATHEMATICAL models
*THERMAL diffusivity
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Language
ISSN
0021-8979
Abstract
The size effects on heat conduction in small systems are analyzed by using irreversible thermodynamics and Boltzmann equation derived heat transport models. The system’s size dependent group velocity of heat waves and thermal response of the system are studied in the diffusive-ballistic transition of heat transport. A critical range of values for the Knudsen number is found which features a dynamic phase transition between the diffusive and ballistic regimes. The transition system’s sizes range from 10 to 380 μm. [ABSTRACT FROM AUTHOR]