Dynamics of passive and active particles in turbulent open channel flow


Wednesday, 25 February, 2015 - 11:30

Speaker: Salvatore Lovecchio (University of Udine - Multiphase Flow Laboratory)

Room: SISSA - Santorio A - room 134

In this talk the behaviour of passive and active particles in a turbulent open channel flow will be investigated. The surface of the turbulent open channel has been treated as a flat free-slip surface that bounds a three-dimensional volume in which the flow is turbulent. This configuration mimics the motion of active/passive ocean surfactants (e.g. phytoplankton, floaters or drifters) when surface waves and ripples are absent. The investigation include the study for stable stratified open channel flow. An extensive campaign of Direct Numerical Simulations (DNS) coupled with Lagrangian Particle Tracking (LPT) is used to study these phenomena. The governing equations are solved using a pseudo-spectral method for the specific case of turbulent water flow in a channel.