Granular Rough Sphere in a Low-Density Thermal Bath
arXiv:0805.2887 · doi:10.1016/j.physa.2008.03.014
Abstract
We study the stationary state of a rough granular sphere immersed in a thermal bath composed of point particles. When the center of mass of the sphere is fixed the stationary angular velocity distribution is shown to be Gaussian with an effective temperature lower than that of the bath. For a freely moving rough sphere coupled to the thermostat via inelastic collisions we find a condition under which the joint distribution of the translational and rotational velocities is a product of Gaussian distributions with the same effective temperature. In this rather unexpected case we derive a formula for the stationary energy flow from the thermostat to the sphere in accordance with Fourier law.
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Cited by in corpus (6)
- Energy nonequipartition in gas mixtures of inelastic rough hard spheres: The tracer limit
- Driven and undriven states of multicomponent granular gases of inelastic and rough hard disks or spheres
- Interplay between polydispersity, inelasticity, and roughness in the freely cooling regime of hard-disk granular gases
- Energy Production Rates of Multicomponent Granular Gases of Rough Particles. A Unified View of Hard-Disk and Hard-Sphere Systems
- Granular gas of inelastic and rough Maxwell particles
- Exact transport coefficients from the inelastic rough Maxwell model of a granular gas