منابع مشابه
Large force fluctuations in a flowing granular medium.
We study fluctuations in the force at the boundary of a 2D granular flow. The forces are mainly impulsive at all flow rates. The probability distribution of impulses decays exponentially at large impulses, as do the forces in a static granular medium. At small impulses, the distribution evolves continuously with flow rate with no indication of the transition from collisional flow to intermitten...
متن کاملTail of the contact force distribution in static granular materials.
We numerically study the distribution P(f) of contact forces in frictionless bead packs, by averaging over the ensemble of all possible force network configurations. We resort to umbrella sampling to resolve the asymptotic decay of P(f) for large f , and determine P(f) down to values of order 10{-45} for ordered and disordered systems in two (2D) and three dimensions (3D). Our findings unambigu...
متن کاملEffects of the force distribution in dry granular materials
This work concentrates on the force-network of dry granular materials. The dynamical and static properties of the force-network are studied through simulations and experiments. We study the structural properties of two-dimensional granular packings prepared by random deposition from a source line. We consider a class of random ballistic deposition models based on single-particle relaxation rule...
متن کاملDynamics of drag and force distributions for projectile impact in a granular medium.
Our experiments and molecular dynamics simulations on a projectile penetrating a two-dimensional granular medium reveal that the mean deceleration of the projectile is constant and proportional to the impact velocity. Thus, the time taken for a projectile to decelerate to a stop is independent of its impact velocity. The simulations show that the probability distribution function of forces on g...
متن کاملDilute granular flows in a medium
Some aspects of the dissipative Boltzmann equation for granular matter diffusing in a background medium are investigated. Both collisions with field particles (supposed to be elastic) and inelastic collisions of the grains between themselves (with non–constant restitution coefficient) are taken into account, leading to the simultaneous presence of two different collision operators. The closure ...
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ژورنال
عنوان ژورنال: Physical Review E
سال: 1998
ISSN: 1063-651X,1095-3787
DOI: 10.1103/physreve.57.3164