Passive control of flow structure interaction between a sphere and free-surface Muammer Ozgoren, Sercan Dogan, Abdulkerim Okbaz, Besir Sahin and Huseyin Akilli EPJ Web of Conferences, 25 (2012) 01065 Published online: 16 April 2012 DOI: 10.1051/epjconf/20122501065