Secondary turbulent flow in an infinte bend

H. Bo Christensen, Kjartan Gislason, Jørgen Fredsøe

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

    Abstract

    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.
    Original languageEnglish
    Title of host publicationI.A.H.R. Symposium on River, Coastal and Estuarine Morphodynamics
    Place of PublicationGenova
    PublisherUniversity of Genova, Department of Environmental Engineering
    Publication date1999
    Publication statusPublished - 1999
    EventIAHR Symposium on River, Coastal and Esturine Morphodynamics - Genoa, Italy
    Duration: 1 Jan 1999 → …

    Conference

    ConferenceIAHR Symposium on River, Coastal and Esturine Morphodynamics
    CityGenoa, Italy
    Period01/01/1999 → …

    Cite this