This paper presents an experimental and numerical study that deals with the problem of mixing grains falling down through a bi-dimensional Galton board (BGB). The special issue addressed here is the influence of the presence of lateral walls in the BGB. Disks of equal diameters but different...

This work correlates the resistance of concrete cores with the physical properties of the granular material forming it. A basic physical characterization is conducted, taking into account the origin of the grains involved in the concrete mixture; that is, if they come from natural degradation...

The first part of this paper studies the behavior of contact force distributions and displacement distributions in isostatic 2-D arrays of polydispersed grains as a function of force strength and displacement strength, respectively. The array is built by pouring disks, one by one, into a...

This work studies the dependence of percolation properties of bidimensional arrays of polydispersed disks on the distance separating the walls of the container holding them. Data for percolation probabilities using different wall separation is analyzed for two extreme values of polydispersity....

The motion of discs in a granular 2D packing slowly tilted till the system loses its stability is studied by image analysis. As in the 3D case (packing of spheres), before the avalanche takes place, the system undergoes several rearrangements of different magnitudes which do not imply lose of...

A percolation model is studied, on a square lattice, with computer simulations. The sites and bonds distributions overlap and introduce correlations between sites and bonds. The percolation thresholds have been evaluated numerically. Percolation becomes easier as the correlation increases. The...

Simulations of percolation processes on random site square lattices are performed implementing a different occupation algorithm for both ordinary percolation (OP) and invasion percolation (IP) problems. The main feature of the occupation process is the fact that it is performed in a locally...