Density distribution of particles upon jamming after an avalanche in a 2D silo

We present a complete analysis of the density distribution of particles in a two dimensional silo after discharge. Simulations through a pseudo-dynamic algorithm are performed for filling and subsequent discharge of a plane silo. Particles are monosized hard disks deposited in the container and subjected to a tapping process for compaction. Then, a hole of a given size is open at the bottom of the silo and the discharge is triggered. After a clogging at the opening is produced, and equilibrium is restored, the final distribution of the remaining particles at the silo is analyzed by dividing the space into cells with different geometrical arrangements to visualize the way in which the density depression near the opening is propagated throughout the system. The different behavior as a function of the compaction degree is discussed.Comment: 11 pages, 10 figure

On the dynamics of a liquid bridge between a sphere and a vertically vibrated solid surface

This work presents an experimental study of the response of a liquid bridge formed between a sphere and a plane solid surface subjected to a vertical sinusoidal vibration. The amplitude and frequency of the oscillations can be varied. The successive movement of the particle along with the bridge deformation is registered to follow the dynamics of the system. The motivation is to figure out how capillary and viscosity forces can be modeled with the help of the experimental data obtained and to settle down a simplified theoretical approach capable of being implemented in the description of many phenomena involving wet granular grains. The results indicate that the viscosity effects can be neglected as soon as the amplitude of the movement is not too small, still obtaining a reasonable description of the dynamical behavior of the sphere/liquid-bridge system

On the dynamics of a liquid bridge between a sphere and a vertically vibrated solid surface

This work presents an experimental study of the response of a liquid bridge formed between a sphere and a plane solid surface subjected to a vertical sinusoidal vibration. The amplitude and frequency of the oscillations can be varied. The successive movement of the particle along with the bridge deformation is registered to follow the dynamics of the system. The motivation is to figure out how capillary and viscosity forces can be modeled with the help of the experimental data obtained and to settle down a simplified theoretical approach capable of being implemented in the description of many phenomena involving wet granular grains. The results indicate that the viscosity effects can be neglected as soon as the amplitude of the movement is not too small, still obtaining a reasonable description of the dynamical behavior of the sphere/liquid-bridge system