Hydrodynamic theory for granular gases
Abstract
A granular gas subjected to a permanent injection of energy is described by means of hydrodynamic equations derived from a moment expansion method. The method uses as reference function not a Maxwellian distribution fM but a distribution f0=ΦfM, such that Φ adds a fourth cumulant κ to the velocity distribution. The formalism is applied to a stationary conductive case showing that the theory fits extraordinarily well the results coming from our Newtonian molecular dynamic simulations once we determine κ as a function of the inelasticity of the particle-particle collisions. The shape of κ is independent of the size N of the system.
- Publication:
-
Physical Review E
- Pub Date:
- August 2000
- DOI:
- 10.1103/PhysRevE.62.2521
- arXiv:
- arXiv:cond-mat/0001250
- Bibcode:
- 2000PhRvE..62.2521R
- Keywords:
-
- 81.05.Rm;
- 05.20.Dd;
- 51.10.+y;
- 47.70.Nd;
- Porous materials;
- granular materials;
- Kinetic theory;
- Kinetic and transport theory of gases;
- Nonequilibrium gas dynamics;
- Condensed Matter - Statistical Mechanics
- E-Print:
- 10 pages, 9 figures, more about our research in http://www.cec.uchile.cl/cinetica/