Analysis and optimization of various sediment catchers in a portable wind tunnel for soil erosion research

Mercier, Patrice Claude. Analysis and optimization of various sediment catchers in a portable wind tunnel for soil erosion research. 2019, Master Thesis, University of Basel, Faculty of Humanities and Social Sciences.

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Official URL: https://edoc.unibas.ch/76949/

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To investigate the isokinetic and aerodynamic performance of aeolian sediment catchers a detailed set of experiments in a Portable Wind and Rainfall Simulator (PWRS) has been executed. Atmospheric flow as a major driver for soil erosion dictates a fundamental understanding of the aerodynamic properties of the used sediment catchers in wind tunnel experiments and in the field. In order to build a new functional trap meeting the requirements of the PWRS, the present work examined and evaluated a conceptual wedge shaped trap from Trier University, Modified Wilson and Cook (MWAC) samplers, and two self-built wedge shaped prototypes. Experiments were carried out at six wind velocities ranging from 6.8 – 13.8 m s-1 and measured with a hot wire anemometer probe. The results show that the two self-built prototypes are performing isokinetic and provide acceptable aerodynamic properties, whereas the conceptual trap from Trier University and the MWACS did not achieve an isokinetic status and provided weaker aerodynamic properties than the self-built prototypes. In conclusion, isokinetic and aerodynamic measurements are valuable methods to improve sediment catchers, in relation to the wind fields surrounding them. As each portable wind tunnel has specific characteristics, the sediment catchers should always first be examined for their basic capabilities in the wind tunnel used.
Advisors:Fister, Wolfgang
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Geowissenschaften > Physiogeographie und Umweltwandel (Kuhn)
UniBasel Contributors:Fister, Wolfgang
Item Type:Thesis
Thesis Subtype:Master Thesis
Thesis status:Complete
Last Modified:09 Jun 2020 04:30
Deposited On:08 Jun 2020 12:25

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