Formation and Topology of vortices in Couette Flow over open cavities Cesare Biserni, Andrea Natale Impiombato, Aminhossein Jahanbin, Eugenia Rossi di Schio and Giovanni Semprini E3S Web Conf., 197 (2020) 10005 Published online: 22 October 2020 DOI: 10.1051/e3sconf/202019710005