Mass flow rate of granular material flowing from tilted bins

We report experiments performed to describe the behavior of the experimental mass flow rate of cohesionless granular material, $M^{'}_{\beta expt} $, through circular orifices of diameter $D$ made on sidewalls of tilted bins. In such experiments, the influence of the wall thickness of the bin, $ w $, and the tilt angle respect to the vertical, $\beta$, were also regarded. The experimental measurements, using beach sand and granulated sugar, yield a linear correlation among $ M^{'}_{\beta expt} $ and a theoretical piecewise correlation of the mass flow rate, $ M^{'}_{\beta} $, which is valid for the overall range of values of $\beta$. Numerical simulation will be also a discussed.