Fate of Boltzmann’s Breathers: Stokes Hypothesis and Anomalous Thermalization - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review Letters Année : 2024

Fate of Boltzmann’s Breathers: Stokes Hypothesis and Anomalous Thermalization

Résumé

Boltzmann showed that in spite of momentum and energy redistribution through collisions, a rarefied gas confined in a isotropic harmonic trapping potential does not reach equilibrium; it evolves instead into a breathing mode where density, velocity, and temperature oscillate. This counterintuitive prediction is upheld by cold atoms experiments. Yet, are the breathers eternal solutions of the dynamics even in an idealized and isolated system? We show by a combination of hydrodynamic arguments and molecular dynamics simulations that an original dissipative mechanism is at work, where the minute and often neglected bulk viscosity eventually thermalizes the system, which thus reaches equilibrium.

Dates et versions

hal-04562353 , version 1 (29-04-2024)

Identifiants

Citer

Maria Isabel Garcia de Soria, Pablo Maynar, David Guéry-Odelin, Emmanuel Trizac. Fate of Boltzmann’s Breathers: Stokes Hypothesis and Anomalous Thermalization. Physical Review Letters, 2024, 132 (2), pp.027101. ⟨10.1103/PhysRevLett.132.027101⟩. ⟨hal-04562353⟩
0 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More