Regensburg 2025 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 23: Poster: Active Matter, Soft Matter, Fluids (joint session DY/CPP)
DY 23.14: Poster
Mittwoch, 19. März 2025, 10:00–12:00, P3
Numerical Simulation of Microplastic Permeation in Soil: from Solutes to Particles — •Hao Liu1, Yifan Lu2, Christina Bogner2, Martin Lörder1, and Stephan Gekle1 — 1University of Bayreuth, Bayreuth, Germany — 2University of Cologne, Cologne, Germany
Microplastics have become significant environmental pollutants, raising concerns about their accumulation and distribution across ecosystems. Although terrestrial environments, particularly soils, often exhibit high levels of microplastic contamination, they remain relatively understudied. Microplastic transport in soil involves complex interactions among particle properties, soil structure, and fluid dynamics. Understanding mechanisms such as permeation, aggregation, and degradation is essential for effective environmental risk assessments and strategies to control microplastic pollution.
This study aims to simulate and predict soil hydraulic conductivity in microplastic-laden flows. Challenges include modeling behaviors of microplastic particles as they transport in soil with complex porous structures. High-resolution μCT scans of soil samples will provide the necessary porous media data, and simulations will be conducted using FluidX3D software. The research progresses in two phases: first, disregarding particle size and shape to analyze solute transport mechanisms; second, incorporating detailed particle properties to study transport and accumulation in pores. The goal is to model microplastic dynamics for accurate predictions of microplastic distribution in soil systems.
Keywords: Microplastics; Soil; Porous Media; Hydraulic Conductivity; Numerical Simulation