Produção Nacional
Role of roughness on the hydrodynamic homogeneous base state of inelastic spheres
2014; American Physical Society; Volume: 89; Issue: 2 Linguagem: Inglês
10.1103/physreve.89.020202
ISSN1550-2376
AutoresFrancisco Vega Reyes, Andrés Santos, Gilberto M. Kremer,
Tópico(s)Particle Dynamics in Fluid Flows
ResumoA gas of inelastic rough spheres admits a spatially homogeneous base state which turns into a hydrodynamic state after a finite relaxation time. We show that this relaxation time is hardly dependent on the degree of inelasticity but increases dramatically with decreasing roughness. An accurate description of translational-rotational velocity correlations at all times is also provided. At a given inelasticity, the roughness parameter can be tuned to produce a huge distortion from the Maxwellian distribution function. The results are obtained from a Grad-like solution of the Boltzmann-Enskog equation complemented by Monte Carlo and molecular dynamics simulations.
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