Behavior of micro-plastic particles in a recirculation zone

Open-channel bifurcations are prevalent in hydraulic networks and diverse environments. This research adopts both Eulerian and Lagrangian approaches to comprehensively understand separation and recirculation zones in a specific bifurcation configuration. The Eulerian analysis challenges traditional views by revealing a complex three-dimensional flow pattern with an ascending helical motion in the separation zone, where water particles rise along the water column. Lagrangian tracking of particle trajectories highlights the importance of particle characteristics, with varying behaviors observed based on size and density. The study provides insights into the intricate dynamics of bifurcation flows, with potential implications for water management and pollution tracking, especially for microplastics.