Discharge flow of granular media from rectangular silos: role of an obstacle and modelling by an orifice at the cornerSamira Laidaoui, Pascale Aussillous, Mohammed Djermane and Blanche Dalloz-DubrujeaudMechanics & Industry, 21 5 (2020) 516DOI: https://doi.org/10.1051/meca/2020048