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    New Near-Wall Treatment for Suspended Sediment Transport Simulations with High Reynolds Number Turbulence Models

    Source: Journal of Hydraulic Engineering:;2014:;Volume ( 140 ):;issue: 003
    Author:
    X. Liu
    DOI: 10.1061/(ASCE)HY.1943-7900.0000824
    Publisher: American Society of Civil Engineers
    Abstract: A new approach is proposed to treat the bottom boundary conditions for suspended sediment transport modeling, which works with turbulence models using wall functions. New boundary conditions for suspended sediment are specified directly at the sediment bed, not at some reference height. It is numerically equivalent to the traditional approach of specifying boundary condition at a reference height. The new approach eliminates the need of any special treatment for the gap between the bed and the reference height. It also reduces the loss of accuracy due to the interpolation of solution variables between the meshes for fluid and suspended sediment. The associated near-bottom grid resolution requirement is discussed and a general guideline is proposed. The application of the new near-wall treatment is demonstrated.
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      New Near-Wall Treatment for Suspended Sediment Transport Simulations with High Reynolds Number Turbulence Models

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    contributor authorX. Liu
    date accessioned2017-05-08T21:52:01Z
    date available2017-05-08T21:52:01Z
    date copyrightMarch 2014
    date issued2014
    identifier other%28asce%29hz%2E1944-8376%2E0000015.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/64689
    description abstractA new approach is proposed to treat the bottom boundary conditions for suspended sediment transport modeling, which works with turbulence models using wall functions. New boundary conditions for suspended sediment are specified directly at the sediment bed, not at some reference height. It is numerically equivalent to the traditional approach of specifying boundary condition at a reference height. The new approach eliminates the need of any special treatment for the gap between the bed and the reference height. It also reduces the loss of accuracy due to the interpolation of solution variables between the meshes for fluid and suspended sediment. The associated near-bottom grid resolution requirement is discussed and a general guideline is proposed. The application of the new near-wall treatment is demonstrated.
    publisherAmerican Society of Civil Engineers
    titleNew Near-Wall Treatment for Suspended Sediment Transport Simulations with High Reynolds Number Turbulence Models
    typeJournal Paper
    journal volume140
    journal issue3
    journal titleJournal of Hydraulic Engineering
    identifier doi10.1061/(ASCE)HY.1943-7900.0000824
    treeJournal of Hydraulic Engineering:;2014:;Volume ( 140 ):;issue: 003
    contenttypeFulltext
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