PMID: 15244557Jul 13, 2004Paper

Thermal convection in monodisperse and bidisperse granular gases: a simulation study

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
Daniela PaolottiA Puglisi

Abstract

We present results of a simulation study of inelastic hard disks vibrated in a vertical container. An event-driven molecular dynamics method is developed for studying the onset of convection. Varying the relevant parameters (inelasticity, number of layers at rest, intensity of the gravity) we are able to obtain a qualitative agreement of our results with recent hydrodynamical predictions. Increasing the inelasticity, a first continuous transition from the absence of convection to one convective roll is observed, followed by a discontinuous transition to two convective rolls, with hysteretic behavior. At fixed inelasticity and increasing gravity, a transition from no convection to one roll can be evidenced. If the gravity is further increased, the roll is eventually suppressed. Increasing the number of monolayers the system eventually localizes mostly at the bottom of the box: in this case multiple convective rolls as well as surface waves appear. We analyze the density and temperature fields and study the existence of symmetry breaking in these fields in the direction perpendicular to the injection of energy. We also study a binary mixture of grains with different properties (inelasticity or diameters). The effect of changing t...Continue Reading

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Citations

Jul 23, 2013·Scientific Reports·Viola FolliClaudio Conti
Apr 7, 2010·Physical Review Letters·Peter EshuisDetlef Lohse
Sep 10, 2016·Physical Review Letters·Giorgio PontualeAndrea Puglisi
Oct 16, 2016·Physical Review. E·Evgeniy Khain, Leonard M Sander
May 16, 2018·Physical Review. E·Loreto Oyarte GálvezDevaraj van der Meer
Aug 3, 2018·The Review of Scientific Instruments·S AumaîtreP Yu
Mar 17, 2011·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Kuo-Ching ChenChi-Hao Lin
Aug 11, 2005·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Dino RissoPatricio Cordero
Nov 9, 2011·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Giulio Costantini, Andrea Puglisi

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