Microplastic Particle Behavior in Turbulent Flows: Insights from Experimental Investigations

This study delves into the complexities of particle motion within turbulent flows, emphasizing its significance in the fields of hydraulics and hydrodynamics. A focal point of this research is the behavior of microplastics (MPs), which are increasingly recognized for their role as pollutants. The impact of these pollutants on ecosystem health is a major concern, underscoring the urgency of the investigation. MPs, defined as plastic particles ranging in size from less than 5 mm to a few microns, exhibit varied hydrodynamic behaviors due to their diverse characteristics, extending from Stokesian to non-linear Newtonian regimes. To explore the behavior of MPs under turbulent conditions, we employed an open-channel flume to generate controlled turbulence. Within this setup, spherical MP particles of specific sizes were introduced to observe their movement and trajectories using particle reconstruction tracking velocimetry (PRTV) technology. This investigation aims to unravel the dynamics and dispersion patterns of spherical MPs subjected to turbulent flow, utilizing advanced experimental setups to discern the behaviors of particles with different diameters. The findings contribute valuable insights into the transport mechanisms of MPs, enhancing our understanding of their potential impacts on aquatic ecosystems and informing strategies for mitigating pollution.