Dynamic drag modeling of submerged aquatic vegetation canopy flows
Details
Serval ID
serval:BIB_5667182FA668
Type
Inproceedings: an article in a conference proceedings.
Collection
Publications
Institution
Title
Dynamic drag modeling of submerged aquatic vegetation canopy flows
Title of the conference
River Flow 2014
Publisher
CRC Press
Organization
Swiss Fed Off Environm; BG Consulting Engineers; Hydro Exploitat SA; E dric ch; IM & IUB Engn; Basler & Hofmann; AquaVis Engn; Met Flow SA; Int Assoc Hydro Environm Engn & Res, Comm Fluvial Hydraul; Stucky; Groupe E; Patscheider Partner; HydroCosmos SA; Kissling Zbinden AG; Ribi SA; Poyry; Swiss Assoc Water Management; Ecole Polytechnique Federale Lausanne, Lab Hydraul Construct
ISBN
978-1-4987-0442-7; 978-1-138-02674-2
Publication state
Published
Issued date
2014
Editor
Schleiss A.J., DeCesare G., Franca M.J., Pfister M.
Pages
517-524
Language
english
Notes
7th International Conference on Fluvial Hydraulics (River Flow), Ecole Polytechnique Federale Lausanne, Lausanne, SWITZERLAND, SEP 03-05, 2014
Abstract
Vegetation has a profound effect on flow and sediment transport
processes in natural rivers, by increasing both skin friction and form
drag. The increase in drag introduces a drag discontinuity between the
in-canopy flow and the flow above, which leads to the development of an
inflection point in the velocity profile, resembling a free shear layer.
Therefore, drag acts as the primary driver for the entire canopy system.
Most current numerical hydraulic models which incorporate vegetation
rely either on simple, static plant forms, or canopy-scaled drag terms.
However, it is suggested that these are insufficient as vegetation
canopies represent complex, dynamic, porous blockages within the flow,
which are subject to spatially and temporally dynamic drag forces. Here
we present a dynamic drag methodology within a CFD framework.
Preliminary results for a benchmark cylinder case highlight the accuracy
of the method, and suggest its applicability to more complex cases.
processes in natural rivers, by increasing both skin friction and form
drag. The increase in drag introduces a drag discontinuity between the
in-canopy flow and the flow above, which leads to the development of an
inflection point in the velocity profile, resembling a free shear layer.
Therefore, drag acts as the primary driver for the entire canopy system.
Most current numerical hydraulic models which incorporate vegetation
rely either on simple, static plant forms, or canopy-scaled drag terms.
However, it is suggested that these are insufficient as vegetation
canopies represent complex, dynamic, porous blockages within the flow,
which are subject to spatially and temporally dynamic drag forces. Here
we present a dynamic drag methodology within a CFD framework.
Preliminary results for a benchmark cylinder case highlight the accuracy
of the method, and suggest its applicability to more complex cases.
Publisher's website
Create date
13/03/2015 13:54
Last modification date
20/08/2019 14:10
Usage data
