Volume 78, Number 2, April 2007
|Number of page(s)||6|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||03 April 2007|
Aging to non-Newtonian hydrodynamics in a granular gas
Departamento de Informática I, Centro Universitario de Mérida, Universidad de Extremadura - E-06800 Mérida, Spain
2 Departamento de Física, Universidad de Extremadura - E-06071 Badajoz, Spain
Accepted: 7 March 2007
The evolution to the steady state of a granular gas subject to simple shear flow is analyzed by means of computer simulations. It is found that, regardless of its initial preparation, the system reaches (after a transient period lasting a few collisions per particle) a non-Newtonian (unsteady) hydrodynamic regime, even at strong dissipation and for states where the time scale associated with inelastic cooling is shorter than the one associated with the irreversible fluxes. Comparison with a simplified rheological model shows a good agreement.
PACS: 45.70.Mg – Granular flow: mixing, segregation and stratification / 05.20.Dd – Kinetic theory / 47.50.-d – Non-Newtonian fluid flows
© Europhysics Letters Association, 2007
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