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A PIV method for particle laden flows in a plane mixing layer
Groups at IfU
Chair of Groundwater and Hydromechanics
Chair of Hydrology and Water Resources Management
Chair of Urban Water Management
Chair of Ecological Systems Design
Chair of Earth Observation and Remote Sensing
Observations of algae in lakes show a faster settling than can be explained by mere Stokes settling. It is suspected that demixing processes lead to higher and lower density regions which are moved as whole by buoyancy. For sediment particles introduced uniformly over time into a mixing layer the thesis showed that a modulation of the spatial density distribution occurs and that the average settling velocity is increased by up to a factor of two compared to Stokes settling. The experiment is performed by two parallel PIV systems, which are synchronized and differentiate between neutrally buoyant particles for flow tracking and heavy sediment particles by colour filters.
Main publication
Dreier, T., S. Blaser, W. Kinzelbach, M. Virant, H.-G. Maas, 2000. Simultaneous measurement of particle and fluid velocities in a plane mixing layer with dispersion. Experiments in Fluids 29, S. 486-493
Contacts
Agency/Funding
SNF/46 kCHF
Partners
IGP, ETH
Status
Finished in 2000
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