Experimental Fluid Mechanics 2011 A.-B. Wang, Ph. Fraunie, L. Skrbek, T. Vit, V. Kopecký, de Lange H., V. Dvořák, K. Perszynski, L. Prášil, J. Hrubý and M. Vestfálová EPJ Web of Conferences, 25 (2012) 00001 Published online: 16 April 2012 DOI: 10.1051/epjconf/20122500001