A slip-based model for the size-dependent effective thermal conductivity of nanowires. (February 2018)

• Record Type: Journal Article
• Authors: Calvo-Schwarzwälder, M.; Hennessy, M.G.; Torres, P.; Myers, T.G.; Alvarez, F.X.
• Is Part Of: International communications in heat and mass transfer. Volume 91(2018:Feb.)
• Page Start: 57
• Page End: 63
• Publication Date: 2018-02
• Subjects: Heat Transfer -- Nanotechnology -- Thermal Conductivity -- Guyer-Krumhansl -- Phonon Hydrodynamics; 80A20; Heat -- Transmission -- Periodicals; Mass transfer -- Periodicals; Chaleur -- Transmission -- Périodiques; Transfert de masse -- Périodiques; Heat -- Transmission; Mass transfer; Periodicals; 621.4022
• DOI: 10.1016/j.icheatmasstransfer.2017.11.013
• Languages: English
• ISSNs: 0735-1933

Abstract

Abstract: The heat flux across a nanowire is computed based on the Guyer-Krumhansl equation. Slip conditions with a slip length depending on both temperature and nanowire radius are introduced at the outer boundary. An explicit expression for the effective thermal conductivity is derived and compared to existing models across a given temperature range, providing excellent agreement with experimental data for Si nanowires.