Exit distribution function crossover in a Galton board

Novel aspects on the segregation in quasi 2D piles

“…The feeding system consists of two vibrating feeders and a 3D and D static mixers in series [21,[24][25][26][27][28]. Each feeder contains a single kind of grain whose mass flow can be controlled.…”

Improving mixture of grains by using bi-dimensional Galton boards

“…These fits were drawn with the corresponding statistical information extracted from the data points, i.e., dispersion and mean value. As clearly seen, as long as W diminishes, the exit distributions become uniform in shape [14] and the fitting Gaussians do not represent the distributions any longer. It seems that at the lowest values of W the final distributions of both types of particles completely overlap, giving a better mixture performance.…”

“…This increment found here is based on the fact that the presence of walls produces a gaussian-to-uniform exit distribution crossover that is of crucial effect in the mixing problem. This crossover has been studied and described elsewhere [14,15] and it has been demonstrated that there is an important commitment between the number of rows and the number of columns needed in a BGB to get the so-mentioned crossover. These results, and the ones showed here, demonstrate that a careful election of the BGB dimensions is crucial for mixture improvement.…”

“…Recently, Benito et al [14,15] have studied and characterized the behavior of the exit distributions of same species of particles falling down through a BGB. They found a change in the behavior of these distributions as the spacing W between walls was reduced.…”

Creating kappa-like distributions from a Galton board

“…The presence of dissipative collisions gives rise to a wide spectra of behaviors depending mainly on a geometric parameter: the ratio between the disk diameter and the effective distance between obstacles. In further studies [13] gave exit distribution functions by regarding the influence of lateral walls on a granular flow through a Galton board. By decreasing the distance between the walls the exit distribution is a crossover from a Gaussian-like to a uniform-like distribution.…”