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dc.contributor.authorHsu, Tian-Jian  Concept link
dc.contributor.authorLiu, Philip L.-F.  Concept link
dc.date.accessioned2010-06-04T18:37:24Z
dc.date.available2010-06-04T18:37:24Z
dc.date.issued2004-06-18
dc.identifier.citationJournal of Geophysical Research 109 (2004): C06018en_US
dc.identifier.urihttps://hdl.handle.net/1912/3583
dc.descriptionAuthor Posting. © American Geophysical Union, 2004. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 109 (2004): C06018, doi:10.1029/2003JC002240.en_US
dc.description.abstractWe present two depth- and phase-resolving models, based on single- and two-phase approaches for suspended sediment transport under water waves. Both models are the extension of a wave hydrodynamic model Cornell Breaking Wave and Structure (COBRAS). In the two-phase approach, dilute two-phase mass and momentum equations are calculated along with a fluid turbulence closure based on balance equations for the fluid turbulence kinetic energy k f and its dissipation rate ε f . In the single-phase approach the fluid flow is described by the Reynolds-Averaged Navier-Stokes equations, while the sediment concentration is calculated by an advection-diffusion equation for the conservation of sediment mass. The fluid turbulence is calculated by k f -ε f equations that incorporate the essential influence of sediment, which can also be consistently deduced from the two-phase theory. By adopting a commonly used sediment flux boundary condition near the bed the proposed models are tested against laboratory measurements of suspended sediment under nonbreaking skewed water waves and shoaling broken waves. Although the models predict wave-averaged sediment concentrations reasonably well, the corresponding time histories of instantaneous sediment concentration are less accurate. We demonstrate that this is due to the uncertainties in the near-bed sediment boundary conditions. In addition, we show that under breaking waves the near-bed sediment pickup cannot be solely parameterized by the bottom friction, suggesting that other effects may also influence the near-bed sediment boundary conditions.en_US
dc.description.sponsorshipThis research has been supported by NSF grants CTS-0000675 and OCE-0095834 to Cornell University. This paper is also a resulting product [R/CCP-9] funded under award NA16RG1645 from the National Sea Grant College Program of U.S. Department of Commerce’s National Oceanic and Atmospheric Administration to the Research Foundation of State University of New York on behalf of New York Sea Grant. The financial supports for Tian-Jian Hsu provided by Department of Civil and Environmental Engineering, University of Delaware, and the Coastal Ocean Institute of Woods Hole Oceanographic Institution are also acknowledged.en_US
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.publisherAmerican Geophysical Unionen_US
dc.relation.urihttps://doi.org/10.1029/2003JC002240
dc.subjectTurbulent suspensionen_US
dc.subjectSuspended sedimenten_US
dc.subjectPick-up functionen_US
dc.titleToward modeling turbulent suspension of sand in the nearshoreen_US
dc.typeArticleen_US
dc.identifier.doi10.1029/2003JC002240


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