Heat transport in phononic-like membranes: Modeling and comparison with modulated nano-wires

Abstract : The thermal conductivity of phononic-like membranes and their analogous nano-wires are computed with both Molecular Dynamics and Monte Carlo simulations. Using both methods, the thermal conductivity of the porous membranes with cylindrical pores is found to be lower than the nano-wire's one for the same scattering surface to volume. This work confirms experimental observations by Nomura et al. (2015) and Yu et al. (2010) for similar systems. The lower thermal conductivity of membranes is attributed to the different orientation of the scattering surfaces either at the pores or at free surfaces and not to coherent effects. The comparison between the porous membranes and nano-wires with periodic cylindrical modulations shows that thermal transport is hindered further when there are surfaces perpendicular to the heat flow. These results show that coherent effects have no impact on thermal transport in both kind of nano-structures at room temperature.
Liste complète des métadonnées

Littérature citée [54 références]  Voir  Masquer  Télécharger

https://hal.univ-lorraine.fr/hal-01578104
Contributeur : David Lacroix <>
Soumis le : mardi 29 août 2017 - 17:16:54
Dernière modification le : lundi 22 janvier 2018 - 09:20:02

Fichier

article_rev_3.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

Collections

Citation

Maxime Verdier, David Lacroix, Konstantinos Termentzidis. Heat transport in phononic-like membranes: Modeling and comparison with modulated nano-wires. International Journal of Heat and Mass Transfer, Elsevier, 2017, 114, pp.550-558. 〈10.1016/j.ijheatmasstransfer.2017.06.067〉. 〈hal-01578104〉

Partager

Métriques

Consultations de la notice

117

Téléchargements de fichiers

80