Thermal convection in granular gases with dissipative lateral walls

Abstract

We consider a granular gas under the action of gravity, fluidized by a vibrating base. We show that a horizontal temperature gradient, here induced by limiting dissipative lateral walls (DLW), leads always to a granular thermal convection (DLW-TC) that is essentially different from ordinary buoyancy-driven convection (BD-TC). In an experiment where BD-TC is inhibited, by reducing gravity with an inclined plane, we always observe a DLW-TC cell next to each lateral wall. Such a cell squeezes towards the nearest wall as the gravity and/or the number of grains increase. Molecular dynamics simulations reproduce the experimental results and indicate that at large gravity or number of grains the DLW-TC is barely detectable.

accepted for publication in Physical Review Letters, supplementary material included in this arxiv submission

References in corpus (1)

• Phase Diagram of Vertically Shaken Granular Matter

Cited by in corpus (13)

• Temperature in and out of equilibrium: a review of concepts, tools and attempts
• An unusual face-on spiral in the wind of the M-type AGB star EP Aquarii
• Slow time scales in a dense vibrofluidized granular material
• The pseudo-two-dimensional dynamics in a system of macroscopic rolling spheres
• The Many Faces of Fluctuation-Dissipation Relations Out of Equilibrium
• Getting hotter by heating less: How driven granular materials dissipate energy in excess
• Zero-gravity thermal convection in granular gases
• Surface band segregation and internal convection in rotating sphere densely filled with granular material: Experiments
• Dissipative lateral walls are sufficient to trigger convection in vibrated granular gases
• Visco-rotational shear instability of Keplerian granular flows
• Molecular hints of two-step transition to convective flow via streamline percolation
• Diffusion and velocity correlations of the phase transitions in a system of macroscopic rolling spheres
• Inherent thermal convection in a gas inside a box under a gravity field