1-d granular gas with little dissipation in
0-g : A comment on "Resonance oscillations in Granular gases"
Abstract:
It is demonstrated that recent
results on 1d granular gas in a container with a vibrating piston, which was
modelled by a shock wave propagation, can be understood with a modelling using
ideas coming from the "thermodynamics of a single particle". Defining
e as the square root of the energetic-restitution coefficient of a single
collision, the mean loss during a round trip of the momentum is calculated in
the limit N(1-e)<<1. It is also demonstrated that the system cannot
propagate sound waves nor shock waves in the limit of N(1-e)<<1 and that
hydrodynamics equations cannot be defined when N(1-e)<<1.
Pacs # : 5.40 ; 45.70 ; 62.20 ; 83.70.Fn
poudres & grains 12 (3), 50-59 (April 2 001)