Flexible fiber in interaction with a dense granular flow close to the jamming transition Nicolas Algarra, Marguerite Leang, Arnaud Lazarus, Damien Vandembroucq and Evelyne Kolb EPJ Web Conf., 140 (2017) 14002 Published online: 30 June 2017 DOI: 10.1051/epjconf/201714014002