Particle-laden flow around an obstacle in a square pipe: experiments and modeling Ouardia Ait Oucheggou, Véronique Pointeau, Guillaume Ricciardi, Élisabeth Guazzelli and Laurence Bergougnoux Mechanics & Industry, 21 5 (2020) 517 Published online: 13 August 2020 DOI: 10.1051/meca/2020063