Discussing the Turbulent Flow (IMAGE) University of Bern Caption Hadi Zolfaghari (front) and Dominik Obrist (back) are discussing the turbulent flow in the mechanical heart valve. Credit M. Kugemann for ARTORG Center, University of Bern Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.