Lagrangian study of the particle transport past a lateral, open-channel cavity

This paper presents a Lagrangian laboratory study of the passive tracer transport in and around lateral, open-channel (square) cavity. Using 3D-particle tracking velocimetry (PTV), trajectories neutrally buoyant seeding particles are measured analyzed to investigate processes governing particle exchanges between cavity adjacent main stream for selected subcritical flow condition. The tracked classified using approach based on their start end positions, i.e., or region. Next, spatial distribution at stream–cavity interface is distinguish typical different classes identify preferential zones net inflow, outflow, local zigzagging across interface. Finally, this investigates influence zigzag motion (net) mass exchange coefficient. Derived from same 3D-PTV dataset, comparison common Eulerian (velocity-based) coefficients suggests that transverse velocity method overestimates significantly because motions.