Publication: Research - peer-review › Article in proceedings – Annual report year: 1999
The flow in an infinite circular bend is inverstigated in both the laminar and fully turbulent flow case, by use of laminar flow solver, a k-e turbulence model, and a fully Reynolds stress turbulence model. The topic of the analysis is to investigate whether a counter-rotating secondary flow cell is formed near the surface at the outer bank. This cell might help to stabilise the bank and hereby be an important factor for the morphology in a meandering river. In the laminar runs stability criterion related to a Dean number was estabilshed. In the simulations with the k-e model and the Reynolds stress model, the influence of the curvature ratio and cross section geometry on the vortex pattern is investigated. Furthermore, it is demonstrated that an-isotropy of turbulence plays an important role for the structure of flow pattern and existence of an extra flow cell.
|Title of host publication||I.A.H.R. Symposium on River, Coastal and Estuarine Morphodynamics|
|Place of publication||Genova|
|Publisher||University of Genova, Department of Environmental Engineering|
|Conference||IAHR Symposium on River, Coastal and Esturine Morphodynamics|
|Period||01/01/99 → …|
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