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Zero-gravity thermal convection in granular gases

A. Rodríguez-Rivas, M. A. López-Castaño, and F. Vega Reyes
Phys. Rev. E 102, 010901(R) – Published 14 July 2020

Abstract

Previous experimental and theoretical evidence has shown that convective flow may appear in granular fluids if subjected to a thermal gradient and gravity (Rayleigh-Bénard-type convection). In contrast to this, we present here evidence of gravity-free thermal convection in a granular gas, with no presence of external thermal gradients either. Convection is here maintained steady by internal gradients due to dissipation and thermal sources at the same temperature. The granular gas is composed by identical disks and is enclosed in a rectangular region. Our results are obtained by means of an event-driven algorithm for inelastic hard disks.

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  • Received 29 October 2019
  • Accepted 23 June 2020

DOI:https://doi.org/10.1103/PhysRevE.102.010901

©2020 American Physical Society

Physics Subject Headings (PhySH)

Polymers & Soft MatterFluid DynamicsStatistical Physics & Thermodynamics

Authors & Affiliations

A. Rodríguez-Rivas, M. A. López-Castaño, and F. Vega Reyes

  • Departamento de Física and Instituto de Computación Científica Avanzada (ICCAEx), Universidad de Extremadura, 06006 Badajoz, Spain

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Issue

Vol. 102, Iss. 1 — July 2020

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