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    Numerical Modeling of Breaking Waves and Cross-Shore Currents on Barred Beaches

    Source: Journal of Waterway, Port, Coastal, and Ocean Engineering:;2011:;Volume ( 137 ):;issue: 006
    Author:
    Mustafa Kemal Cambazoglu
    ,
    Kevin A. Haas
    DOI: 10.1061/(ASCE)WW.1943-5460.0000096
    Publisher: American Society of Civil Engineers
    Abstract: A process-based numerical model has been used to study nearshore hydrodynamics on barred beaches. A laboratory experiment with an offshore bar migration case followed by an onshore bar migration is simulated. A new mechanism is incorporated in the model accounting for the breaking-wave persistence improving model performance for wave properties, particularly in the bar-trough region. A cross-shore variation of the breaking-wave parameter is introduced to the dissipation model. The effects of the surface shape parameter and a roller lag on radiation stresses and mean water-level predictions are investigated and found to improve the mean water-level predictions. The cross-shore variation of the momentum balance is presented to illustrate the variation of forcing for the undertow current. The persistence length and the roller lag mechanisms are shown to be important for predictions of the undertow currents on barred beaches and the current predictions are improved once both methods are used.
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      Numerical Modeling of Breaking Waves and Cross-Shore Currents on Barred Beaches

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    http://yetl.yabesh.ir/yetl1/handle/yetl/70374
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    • Journal of Waterway, Port, Coastal, and Ocean Engineering

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    contributor authorMustafa Kemal Cambazoglu
    contributor authorKevin A. Haas
    date accessioned2017-05-08T22:04:07Z
    date available2017-05-08T22:04:07Z
    date copyrightNovember 2011
    date issued2011
    identifier other%28asce%29ww%2E1943-5460%2E0000143.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/70374
    description abstractA process-based numerical model has been used to study nearshore hydrodynamics on barred beaches. A laboratory experiment with an offshore bar migration case followed by an onshore bar migration is simulated. A new mechanism is incorporated in the model accounting for the breaking-wave persistence improving model performance for wave properties, particularly in the bar-trough region. A cross-shore variation of the breaking-wave parameter is introduced to the dissipation model. The effects of the surface shape parameter and a roller lag on radiation stresses and mean water-level predictions are investigated and found to improve the mean water-level predictions. The cross-shore variation of the momentum balance is presented to illustrate the variation of forcing for the undertow current. The persistence length and the roller lag mechanisms are shown to be important for predictions of the undertow currents on barred beaches and the current predictions are improved once both methods are used.
    publisherAmerican Society of Civil Engineers
    titleNumerical Modeling of Breaking Waves and Cross-Shore Currents on Barred Beaches
    typeJournal Paper
    journal volume137
    journal issue6
    journal titleJournal of Waterway, Port, Coastal, and Ocean Engineering
    identifier doi10.1061/(ASCE)WW.1943-5460.0000096
    treeJournal of Waterway, Port, Coastal, and Ocean Engineering:;2011:;Volume ( 137 ):;issue: 006
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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