A stochastic force model for the ballistic-diffusive transition of heat conduction

Palla, Pier Luca; Patera, Giuseppe; Cleri, Fabrizio; Giordano, Stefano

Document type :

Compte-rendu et recension critique d'ouvrage

DOI :

10.1088/1402-4896/ab8d56

Title :

A stochastic force model for the ballistic-diffusive transition of heat conduction

Author(s) :

Palla, Pier Luca [Auteur]

Physique - IEMN [PHYSIQUE - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Patera, Giuseppe [Auteur]

Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Cleri, Fabrizio [Auteur]

Physique - IEMN [PHYSIQUE - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Giordano, Stefano [Auteur]

Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN [AIMAN-FILMS - IEMN]

Journal title :

Physica Scripta

Pages :

075703

Publisher :

IOP Publishing

Publication date :

2020-07-01

ISSN :

0031-8949

English keyword(s) :

heat conduction
stochastic methods
transport processes

HAL domain(s) :

Physique [physics]
Science non linéaire [physics]

English abstract : [en]

We theoretically study the heat conduction in a harmonic chain with a stochastic force field, in contact with two Langevin thermal baths at different temperatures. In particular, we investigate the interplay between the ...
Show more >We theoretically study the heat conduction in a harmonic chain with a stochastic force field, in contact with two Langevin thermal baths at different temperatures. In particular, we investigate the interplay between the thermal baths properties and the size of the system. To this aim, we introduce a stochastic force field, which is simple enough to be energy-conserving for each particle of the chain, but sufficiently aleatory to induce the ballistic to diffusive transition in the conductive behavior of the chain. When this stochastic force field is absent, we observe a ballistic behavior strongly dependent on the characteristic collision frequency of the thermal baths for any size of the system. On the other hand, when the stochastic force field is activated, the diffusive behavior is established and the effect of the thermal baths is removed in the thermodynamic limit.Show less >

Language :

Anglais

Popular science :

Non

Collections :

Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM) - UMR 8523

Source :

Harvested from HAL

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