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    On Surf Zone Fluid Dynamics

    Source: Journal of Physical Oceanography:;2020:;volume( ):;issue: -::page 1
    Author:
    Mellor, George
    DOI: 10.1175/JPO-D-19-0318.1
    Publisher: American Meteorological Society
    Abstract: There have been several numerical models developed to represent the phase-averaged flow in the surf zone which is characterized by kD less than unity where k is wave number and D is the water column depth. The classic scenario is that of surface gravity waves progressing on to a shore which create an offshore undertow current. In fact, in some models, flow velocities are parameterized assuming the existence of an undertow. The present approach uses the full vertically dependent continuity and momentum equations and the vertically dependent wave radiation stress in addition to turbulence equations. The model is applied to data which feature measurements of wave properties and also cross-shore velocities. In this paper, both the data and the model application are unidirectional and the suface stress is nil representing the simplest sutf zone application. Breaking waves are described empirically. Special to the surf zone, it is found that a simple empirical adjustment of the radiation stress enables a favorable comparison with data. Otherwise, the model applies to the open ocean with no further empiricism.A new bottom friction algorithm had been derived and is introduced in this paper. In the context of the turbulence transport model, the algorithm is relatively simple.
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      On Surf Zone Fluid Dynamics

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    contributor authorMellor, George
    date accessioned2022-01-30T18:04:50Z
    date available2022-01-30T18:04:50Z
    date copyright10/23/2020 12:00:00 AM
    date issued2020
    identifier issn0022-3670
    identifier otherjpod190318.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4264459
    description abstractThere have been several numerical models developed to represent the phase-averaged flow in the surf zone which is characterized by kD less than unity where k is wave number and D is the water column depth. The classic scenario is that of surface gravity waves progressing on to a shore which create an offshore undertow current. In fact, in some models, flow velocities are parameterized assuming the existence of an undertow. The present approach uses the full vertically dependent continuity and momentum equations and the vertically dependent wave radiation stress in addition to turbulence equations. The model is applied to data which feature measurements of wave properties and also cross-shore velocities. In this paper, both the data and the model application are unidirectional and the suface stress is nil representing the simplest sutf zone application. Breaking waves are described empirically. Special to the surf zone, it is found that a simple empirical adjustment of the radiation stress enables a favorable comparison with data. Otherwise, the model applies to the open ocean with no further empiricism.A new bottom friction algorithm had been derived and is introduced in this paper. In the context of the turbulence transport model, the algorithm is relatively simple.
    publisherAmerican Meteorological Society
    titleOn Surf Zone Fluid Dynamics
    typeJournal Paper
    journal titleJournal of Physical Oceanography
    identifier doi10.1175/JPO-D-19-0318.1
    journal fristpage1
    journal lastpage30
    treeJournal of Physical Oceanography:;2020:;volume( ):;issue: -
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian