Measurement of Cyclic Flows in Trachea Using PIV and Numerical simulation Miloslav Bělka, Jakub Elcner, Jan Jedelský, Olivier Boiron, Yannick Knapp and Lucie Bailly EPJ Web of Conferences, 92 (2015) 02006 Published online: 06 May 2015 DOI: 10.1051/epjconf/20159202006