Characterization of cavitation during the closing of mechanical (heart) valves

One of the still open questions in wall turbulence is to link instantaneous flow features with the currently available wealth of statistical insights: how are these structures "put together" in time in order to create the well-established statistical picture? This is especially crucial in high-Reynolds number flows, which are still unattainable by direct numerical simulations and for which time-resolved experimental data are relatively scarce. The goal of this  project is to fill this gap in available data but also in the subsequent analysis. The focus will be coherent structures in the logarithmic and wake regions and specifically their time footprint and evolution. To achieve this goal, high-quality experiments will be designed and performed in moderate-to high-Reynolds number turbulent boundary layers, by employing state-of-the-art high-speed systems in water flows.

Project is funded by AFOSR (Award No: FA8655-22-1-7001)

Chair:
Multiphase Systems

Involved People:
Dr. A. (Angeliki) Laskari