Granular Fluids with Solid Friction and Heating

Abstract

We perform large-scale molecular dynamics simulations to study heated granular fluids in three dimensions. Granular particles dissipate their kinetic energy due to solid frictional interaction with other particles. The velocity of each particle is perturbed by a uniformly-distributed random noise, which mimics the heating. At the early stage of evolution, the kinetic energy of the system decays with time and reaches a steady state at a later stage. The velocity distribution in the steady state shows a non-Gaussian distribution. This has been characterized by using the Sonine polynomial expansion for a wide range of densities. Particles show diffusive motion for densities below the jamming density ${\varphi }_{\mathrm{J}}$

28 Pages, 8 Figures

References in corpus (6)

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• Brownian ratchet in a thermal bath driven by Coulomb friction
• Granular Brownian motion with dry friction
• The second and third Sonine coefficients of a freely cooling granular gas revisited
• Clustering and Velocity Distributions in Granular Gases Cooling by Solid Friction
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