View in EDS

Sediment transport and morphodynamics generated by a dam-break swash uprush: Coupled vs uncoupled modeling.

Saved in:
Bibliographic Details
Title: Sediment transport and morphodynamics generated by a dam-break swash uprush: Coupled vs uncoupled modeling.
Authors: Postacchini, Matteo1 m.postacchini@univpm.it, Othman, Ilya K.2, Brocchini, Maurizio1, Baldock, Tom E.3
Source: Coastal Engineering. Jul2014, Vol. 89, p99-105. 7p.
Subjects: Sediment transport, Hydrodynamics, Viscosity, Computer simulation, Turbulence, Dams
Abstract: Abstract: The present work analyzes the hydro-morphodynamics characterizing the swash region during the uprush stage. A comparison is illustrated between the sediment transport measured in a series of dam-break experiments and that predicted by the numerical hydro-morphodynamic model of Postacchini et al. (2012). The primary aim is to investigate the differences arising between the weakly coupled or uncoupled model and the measurements, in terms of hydrodynamics, tip celerity and sediment transport. The hydrodynamics are well described by the model and results have been used to calibrate both friction factor and subgrid turbulent viscosity. Comparison of numerically-computed tip celerity with experimental data reveals a fairly good agreement, i.e. a mean error of about 10%, while modeled sediment transport differs by about 40% from the available data. No evident differences are found between results obtained from the coupled and uncoupled model runs (2% for the celerity and 11% for the sediment transport rate at the tip), suggesting that for the specific flow under investigation, at the leading edge of the swash front, hydro-morphological coupling is not an issue of fundamental importance. However, for the special case here of a swash forced by a dam-break, scour occurs at the dam location, and in this case the erosion of the bed is significantly larger in the uncoupled model. [Copyright &y& Elsevier]
Copyright of Coastal Engineering is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
FullText Text:
  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 96026581
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Sediment transport and morphodynamics generated by a dam-break swash uprush: Coupled vs uncoupled modeling.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Postacchini%2C+Matteo%22">Postacchini, Matteo</searchLink><relatesTo>1</relatesTo><i> m.postacchini@univpm.it</i><br /><searchLink fieldCode="AR" term="%22Othman%2C+Ilya+K%2E%22">Othman, Ilya K.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Brocchini%2C+Maurizio%22">Brocchini, Maurizio</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Baldock%2C+Tom+E%2E%22">Baldock, Tom E.</searchLink><relatesTo>3</relatesTo>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Coastal+Engineering%22">Coastal Engineering</searchLink>. Jul2014, Vol. 89, p99-105. 7p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Sediment+transport%22">Sediment transport</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrodynamics%22">Hydrodynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Viscosity%22">Viscosity</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+simulation%22">Computer simulation</searchLink><br /><searchLink fieldCode="DE" term="%22Turbulence%22">Turbulence</searchLink><br /><searchLink fieldCode="DE" term="%22Dams%22">Dams</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Abstract: The present work analyzes the hydro-morphodynamics characterizing the swash region during the uprush stage. A comparison is illustrated between the sediment transport measured in a series of dam-break experiments and that predicted by the numerical hydro-morphodynamic model of Postacchini et al. (2012). The primary aim is to investigate the differences arising between the weakly coupled or uncoupled model and the measurements, in terms of hydrodynamics, tip celerity and sediment transport. The hydrodynamics are well described by the model and results have been used to calibrate both friction factor and subgrid turbulent viscosity. Comparison of numerically-computed tip celerity with experimental data reveals a fairly good agreement, i.e. a mean error of about 10%, while modeled sediment transport differs by about 40% from the available data. No evident differences are found between results obtained from the coupled and uncoupled model runs (2% for the celerity and 11% for the sediment transport rate at the tip), suggesting that for the specific flow under investigation, at the leading edge of the swash front, hydro-morphological coupling is not an issue of fundamental importance. However, for the special case here of a swash forced by a dam-break, scour occurs at the dam location, and in this case the erosion of the bed is significantly larger in the uncoupled model. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Coastal Engineering is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=96026581
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.coastaleng.2014.04.003
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 7
        StartPage: 99
    Subjects:
      – SubjectFull: Sediment transport
        Type: general
      – SubjectFull: Hydrodynamics
        Type: general
      – SubjectFull: Viscosity
        Type: general
      – SubjectFull: Computer simulation
        Type: general
      – SubjectFull: Turbulence
        Type: general
      – SubjectFull: Dams
        Type: general
    Titles:
      – TitleFull: Sediment transport and morphodynamics generated by a dam-break swash uprush: Coupled vs uncoupled modeling.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Postacchini, Matteo
      – PersonEntity:
          Name:
            NameFull: Othman, Ilya K.
      – PersonEntity:
          Name:
            NameFull: Brocchini, Maurizio
      – PersonEntity:
          Name:
            NameFull: Baldock, Tom E.
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 07
              Text: Jul2014
              Type: published
              Y: 2014
          Identifiers:
            – Type: issn-print
              Value: 03783839
          Numbering:
            – Type: volume
              Value: 89
          Titles:
            – TitleFull: Coastal Engineering
              Type: main
ResultId 1