Inertial shear flow of assemblies of frictionless polygons: Rheology and microstructure Émilien Azéma, Farhang Radjaï and Jean-Noël Roux Eur. Phys. J. E, 41 1 (2018) 2 Published online: 05 January 2018 DOI: 10.1140/epje/i2018-11608-9