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iDEA: Drexel E-repository and Archives > Drexel Academic Community > College of Engineering > Department of Civil, Architectural,and Environmental Engineering > Proceedings of the 7th International Conference on HydroScience and Engineering (ICHE 2006) [ISBN: 0977447405] > Large eddy simulation of flow in a channel with multiple lateral groyne fields

Please use this identifier to cite or link to this item: http://hdl.handle.net/1860/1382

Title: Large eddy simulation of flow in a channel with multiple lateral groyne fields
Authors: McCoy, Andrew
Constantinescu, George
Weber, Larry
Keywords: Large eddy simulation;Pollutant fate and transport;Computational hydraulics;Water quality
Issue Date: 11-Sep-2006
Publisher: Michael Piasecki and College of Engineering, Drexel University
Citation: Proceedings of the Seventh International Conference on Hydroscience and Engineering, Philadelphia, PA, September 2006. http://hdl.handle.net/1860/732
Abstract: Large Eddy Simulation (LES) is used to study the flow in a straight open channel containing a multiple-embayment groyne field with fully emerged groynes. The model is validated using data collected at the free surface in a previous experimental study. It is found that the flow inside the mixing layer region between the embayments and the channel is strongly non-uniform over the depth. The large-scale eddies that populate the mixing layer can penetrate the embayment region over lateral distances of the order of the channel depth and advect with them channel fluid inside the embayment where it is mixed with the embayment fluid by the small scales. The other main mixing mechanism is due to the injection of patches of high-vorticity mixing-layer fluid near the tip of the downstream groyne. It is shown that in average most of the fluid leaves the embayment region via the top layer of the embayment-channel interface and enters the embayment region at levels situated around the mid-depth of the interface surface. This explains why the mass exchange coefficients are overestimated when predicted using methods that employ floating particles as a tracer.
Description: Paper presented at The Seventh International Conference on HydroScience and Engineering (ICHE)hosted by the College of Engineering at Drexel Univeristy on September 10-13, 2006 in Philadelphia, Pennsylvania. The conference theme was IT in the Field of HydroSciences. It included several mini-symposia that emphasized IT topics in HydroSciences and the yearly meeting of the metadata group of the International Oceanographic Data and Information Exchange organization.
URI: http://hdl.handle.net/1860/1382
ISBN: 0977447405
Appears in Collections:Proceedings of the 7th International Conference on HydroScience and Engineering (ICHE 2006) [ISBN: 0977447405]

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