A depth-averaged non-cohesive sediment transport model with improved discretization of flux and source terms

Zhao, Jiaheng; Özgen-Xian, Ilhan; Liang, Dongfang; Wang, Tian; Hinkelmann, Reinhard

doi:10.1016/j.jhydrol.2018.12.059

Title: A depth-averaged non-cohesive sediment transport model with improved discretization of flux and source terms

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Abstract

Here, this paper presents novel flux and source term treatments within a Godunov-type finite volume framework for predicting the depth-averaged shallow water flow and sediment transport with enhanced the accuracy and stability. The suspended load ratio is introduced to differentiate between the advection of the suspended load and the advection of water. A modified Harten, Lax and van Leer Riemann solver with the contact wave restored (HLLC) is derived for the flux calculation based on the new wave pattern involving the suspended load ratio. The source term calculation is enhanced by means of a novel splitting-point implicit discretization. The slope effect is introduced by modifying the critical shear stress, with two treatments being discussed. The numerical scheme is tested in five examples that comprise both fixed and movable beds. The model predictions show good agreement with measurement, except for cases where local three-dimensional effects dominate.

Authors:

Zhao, Jiaheng ^[1]; Özgen-Xian, Ilhan ^[2]; Liang, Dongfang ^[3]; Wang, Tian ^[4]; Hinkelmann, Reinhard ^[1]

Technische Univ. Berlin (Germany)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Energy Geosciences Division
Univ. of Cambridge, Cambridge (United Kingdom)
Technische Univ. Berlin (Germany); Xi’an Univ. of Technology, Xi’an (China)

Publication Date:: 2019-01-14

Research Org.:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC); China Scholarship Council; Technische Univ. Berlin

OSTI Identifier:: 1580381

Grant/Contract Number:: AC02-05CH11231

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Hydrology

Additional Journal Information:: Journal Volume: 570; Journal Issue: C; Journal ID: ISSN 0022-1694

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 58 GEOSCIENCES

Citation Formats


                    Zhao, Jiaheng, Özgen-Xian, Ilhan, Liang, Dongfang, Wang, Tian, and Hinkelmann, Reinhard. A depth-averaged non-cohesive sediment transport model with improved discretization of flux and source terms.  United States: N. p., 2019. 
Web.  https://doi.org/10.1016/j.jhydrol.2018.12.059.

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                    Zhao, Jiaheng, Özgen-Xian, Ilhan, Liang, Dongfang, Wang, Tian, & Hinkelmann, Reinhard. A depth-averaged non-cohesive sediment transport model with improved discretization of flux and source terms.  United States.  https://doi.org/10.1016/j.jhydrol.2018.12.059

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                    Zhao, Jiaheng, Özgen-Xian, Ilhan, Liang, Dongfang, Wang, Tian, and Hinkelmann, Reinhard. Mon .  
"A depth-averaged non-cohesive sediment transport model with improved discretization of flux and source terms".  United States.  https://doi.org/10.1016/j.jhydrol.2018.12.059.  https://www.osti.gov/servlets/purl/1580381.

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@article{osti_1580381,

  title        = {A depth-averaged non-cohesive sediment transport model with improved discretization of flux and source terms},

  author       = {Zhao, Jiaheng and Özgen-Xian, Ilhan and Liang, Dongfang and Wang, Tian and Hinkelmann, Reinhard},

  abstractNote = {Here, this paper presents novel flux and source term treatments within a Godunov-type finite volume framework for predicting the depth-averaged shallow water flow and sediment transport with enhanced the accuracy and stability. The suspended load ratio is introduced to differentiate between the advection of the suspended load and the advection of water. A modified Harten, Lax and van Leer Riemann solver with the contact wave restored (HLLC) is derived for the flux calculation based on the new wave pattern involving the suspended load ratio. The source term calculation is enhanced by means of a novel splitting-point implicit discretization. The slope effect is introduced by modifying the critical shear stress, with two treatments being discussed. The numerical scheme is tested in five examples that comprise both fixed and movable beds. The model predictions show good agreement with measurement, except for cases where local three-dimensional effects dominate.},

  doi          = {10.1016/j.jhydrol.2018.12.059},

  journal      = {Journal of Hydrology},

  number       = C,

  volume       = 570,

  place        = {United States},

  year         = {2019},

  month        = {1}

}

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