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    Towards Predicting Sediment Transport in Combined Wave-Current Flow

    Source: Journal of Waterway, Port, Coastal, and Ocean Engineering:;1996:;Volume ( 122 ):;issue: 004
    Author:
    Zhihong Li
    ,
    Alan G. Davies
    DOI: 10.1061/(ASCE)0733-950X(1996)122:4(157)
    Publisher: American Society of Civil Engineers
    Abstract: A one-dimensional, vertical (1DV) grid model has been developed for the prediction of sediment transport in combined wave-current flow under sheet flow conditions. The model uses a one-equation turbulence closure scheme to simulate vertical mixing processes, and a time-varying reference concentration as the bottom boundary condition for the suspended sediment layer. Comparison with recent experimental data shows that the model gives good predictions (within 30%) of the measured net sediment transport rates under different conditions. The results also demonstrate the importance of the “wave-related” contribution to the suspended transport, due to the unsteadiness in the velocity and sediment concentration fields. At certain elevations above the bed, the suspended flux may be in the direction opposite to that of the mean current as a result of the phase relationship between the horizontal velocity and sediment concentration.
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      Towards Predicting Sediment Transport in Combined Wave-Current Flow

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    http://yetl.yabesh.ir/yetl1/handle/yetl/41147
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    • Journal of Waterway, Port, Coastal, and Ocean Engineering

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    contributor authorZhihong Li
    contributor authorAlan G. Davies
    date accessioned2017-05-08T21:09:57Z
    date available2017-05-08T21:09:57Z
    date copyrightJuly 1996
    date issued1996
    identifier other%28asce%290733-950x%281996%29122%3A4%28157%29.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/41147
    description abstractA one-dimensional, vertical (1DV) grid model has been developed for the prediction of sediment transport in combined wave-current flow under sheet flow conditions. The model uses a one-equation turbulence closure scheme to simulate vertical mixing processes, and a time-varying reference concentration as the bottom boundary condition for the suspended sediment layer. Comparison with recent experimental data shows that the model gives good predictions (within 30%) of the measured net sediment transport rates under different conditions. The results also demonstrate the importance of the “wave-related” contribution to the suspended transport, due to the unsteadiness in the velocity and sediment concentration fields. At certain elevations above the bed, the suspended flux may be in the direction opposite to that of the mean current as a result of the phase relationship between the horizontal velocity and sediment concentration.
    publisherAmerican Society of Civil Engineers
    titleTowards Predicting Sediment Transport in Combined Wave-Current Flow
    typeJournal Paper
    journal volume122
    journal issue4
    journal titleJournal of Waterway, Port, Coastal, and Ocean Engineering
    identifier doi10.1061/(ASCE)0733-950X(1996)122:4(157)
    treeJournal of Waterway, Port, Coastal, and Ocean Engineering:;1996:;Volume ( 122 ):;issue: 004
    contenttypeFulltext
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