Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
On Instantanous Behaviour of Microplastic Contaminants in Turbulent Flow
The global plastic waste generation increased drastically during the past decade, and therefore, microplastic (MP) input to the aquatic environment is growing exponentially. MP distribution in the aquatic environment is linked to particles’ physical characteristics. However, due to different origins and exposure to various weathering processes, MPs possess an extensive range of densities, shapes, and sizes. Turbulent structure induced by different mechanisms, such as temperature gradient, wind, and sudden topography changes, is another dominant factor affecting MP transport and distribution. This study aims to investigate the combined effect of size and density on the entrainment and mixing behaviour of MPs in a turbulent flow induced over the backward facing step. We used well-known sediment analogy criteria to study MP mixing and entrainment. Settling parameter, Stokes number, and trapping radius are used in this study to understand the entrainment and distribution of MPs in turbulent structures with different turbulent intensities. The first parameter describes the particle entrainment in the ambient fluid, while the other two parameters describe the distribution and mixing behaviour of particles. Our analysis demonstrates universal trends for MPs entrainment and distribution with the ambient flow dominated by MP size and density, combined with the turbulent flow hydrodynamics.
On Instantanous Behaviour of Microplastic Contaminants in Turbulent Flow
The global plastic waste generation increased drastically during the past decade, and therefore, microplastic (MP) input to the aquatic environment is growing exponentially. MP distribution in the aquatic environment is linked to particles’ physical characteristics. However, due to different origins and exposure to various weathering processes, MPs possess an extensive range of densities, shapes, and sizes. Turbulent structure induced by different mechanisms, such as temperature gradient, wind, and sudden topography changes, is another dominant factor affecting MP transport and distribution. This study aims to investigate the combined effect of size and density on the entrainment and mixing behaviour of MPs in a turbulent flow induced over the backward facing step. We used well-known sediment analogy criteria to study MP mixing and entrainment. Settling parameter, Stokes number, and trapping radius are used in this study to understand the entrainment and distribution of MPs in turbulent structures with different turbulent intensities. The first parameter describes the particle entrainment in the ambient fluid, while the other two parameters describe the distribution and mixing behaviour of particles. Our analysis demonstrates universal trends for MPs entrainment and distribution with the ambient flow dominated by MP size and density, combined with the turbulent flow hydrodynamics.
On Instantanous Behaviour of Microplastic Contaminants in Turbulent Flow
Lecture Notes in Civil Engineering
Gupta, Rishi (Herausgeber:in) / Sun, Min (Herausgeber:in) / Brzev, Svetlana (Herausgeber:in) / Alam, M. Shahria (Herausgeber:in) / Ng, Kelvin Tsun Wai (Herausgeber:in) / Li, Jianbing (Herausgeber:in) / El Damatty, Ashraf (Herausgeber:in) / Lim, Clark (Herausgeber:in) / Shamskhany, Arefeh (Autor:in) / Karimpour, Shooka (Autor:in)
Canadian Society of Civil Engineering Annual Conference ; 2022 ; Whistler, BC, BC, Canada
Proceedings of the Canadian Society of Civil Engineering Annual Conference 2022 ; Kapitel: 70 ; 1101-1116
17.08.2023
16 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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