Numerical modeling of flow and morphology induced by a solitary wave on a sloping beach

Jinzhao Li, Meilan Qi*, David R. Fuhrman

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A fully-coupled (hydrodynamic and morphologic) numerical model based on the open-source computational fluid dynamics (CFD) package OpenFOAM is presented and utilized to simulate flow and morphology induced by a solitary wave on a sloping beach. The hydrodynamic model is based on Reynolds-averaged Navier-Stokes (RANS) equations together with k-ω turbulence closure and volume of fluid (VOF) method for capturing the free surface. These are then coupled with both bed load and suspended load transport descriptions, which drive resultant morphology of the bed. The present numerical model is validated against a laboratory experiment of flow and morphological change induced by a solitary wave. The rigid-bed simulation illustrates that the numerical model can reasonably reproduce the characteristic sequences as observed in the experiment, including the wave shoaling, breaking, runup, rundown, hydraulic jump and trailing wave. The quantitative agreement between computed and measured results, including surface elevation, bed shear stress, and turbulent kinetic energy are satisfactory. The sediment-bed simulation demonstrates that the computed tendency of the bed profile evolution fits well with the measured results, showing the general pattern of both offshore deposition and onshore erosion. The deposition height is fairly well predicted, while the erosion depth is generally underestimated in the swash zone where the water depth is extremely thin. Overall, the results obtained from the present model are promising, especially considering the complexity of the coupled flow and morphological processes involved.
Original languageEnglish
JournalApplied Ocean Research
Volume82
Pages (from-to)259 - 273
ISSN0141-1187
DOIs
Publication statusPublished - 2019

Keywords

  • Numerical modeling
  • RANS
  • Solitary wave
  • Sediment transport
  • Morphology
  • Sloping beach

Cite this

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title = "Numerical modeling of flow and morphology induced by a solitary wave on a sloping beach",
abstract = "A fully-coupled (hydrodynamic and morphologic) numerical model based on the open-source computational fluid dynamics (CFD) package OpenFOAM is presented and utilized to simulate flow and morphology induced by a solitary wave on a sloping beach. The hydrodynamic model is based on Reynolds-averaged Navier-Stokes (RANS) equations together with k-ω turbulence closure and volume of fluid (VOF) method for capturing the free surface. These are then coupled with both bed load and suspended load transport descriptions, which drive resultant morphology of the bed. The present numerical model is validated against a laboratory experiment of flow and morphological change induced by a solitary wave. The rigid-bed simulation illustrates that the numerical model can reasonably reproduce the characteristic sequences as observed in the experiment, including the wave shoaling, breaking, runup, rundown, hydraulic jump and trailing wave. The quantitative agreement between computed and measured results, including surface elevation, bed shear stress, and turbulent kinetic energy are satisfactory. The sediment-bed simulation demonstrates that the computed tendency of the bed profile evolution fits well with the measured results, showing the general pattern of both offshore deposition and onshore erosion. The deposition height is fairly well predicted, while the erosion depth is generally underestimated in the swash zone where the water depth is extremely thin. Overall, the results obtained from the present model are promising, especially considering the complexity of the coupled flow and morphological processes involved.",
keywords = "Numerical modeling, RANS, Solitary wave, Sediment transport, Morphology, Sloping beach",
author = "Jinzhao Li and Meilan Qi and Fuhrman, {David R.}",
year = "2019",
doi = "10.1016/j.apor.2018.11.007",
language = "English",
volume = "82",
pages = "259 -- 273",
journal = "Applied Ocean Research",
issn = "0141-1187",
publisher = "Pergamon Press",

}

Numerical modeling of flow and morphology induced by a solitary wave on a sloping beach. / Li, Jinzhao; Qi, Meilan; Fuhrman, David R.

In: Applied Ocean Research, Vol. 82, 2019, p. 259 - 273.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Numerical modeling of flow and morphology induced by a solitary wave on a sloping beach

AU - Li, Jinzhao

AU - Qi, Meilan

AU - Fuhrman, David R.

PY - 2019

Y1 - 2019

N2 - A fully-coupled (hydrodynamic and morphologic) numerical model based on the open-source computational fluid dynamics (CFD) package OpenFOAM is presented and utilized to simulate flow and morphology induced by a solitary wave on a sloping beach. The hydrodynamic model is based on Reynolds-averaged Navier-Stokes (RANS) equations together with k-ω turbulence closure and volume of fluid (VOF) method for capturing the free surface. These are then coupled with both bed load and suspended load transport descriptions, which drive resultant morphology of the bed. The present numerical model is validated against a laboratory experiment of flow and morphological change induced by a solitary wave. The rigid-bed simulation illustrates that the numerical model can reasonably reproduce the characteristic sequences as observed in the experiment, including the wave shoaling, breaking, runup, rundown, hydraulic jump and trailing wave. The quantitative agreement between computed and measured results, including surface elevation, bed shear stress, and turbulent kinetic energy are satisfactory. The sediment-bed simulation demonstrates that the computed tendency of the bed profile evolution fits well with the measured results, showing the general pattern of both offshore deposition and onshore erosion. The deposition height is fairly well predicted, while the erosion depth is generally underestimated in the swash zone where the water depth is extremely thin. Overall, the results obtained from the present model are promising, especially considering the complexity of the coupled flow and morphological processes involved.

AB - A fully-coupled (hydrodynamic and morphologic) numerical model based on the open-source computational fluid dynamics (CFD) package OpenFOAM is presented and utilized to simulate flow and morphology induced by a solitary wave on a sloping beach. The hydrodynamic model is based on Reynolds-averaged Navier-Stokes (RANS) equations together with k-ω turbulence closure and volume of fluid (VOF) method for capturing the free surface. These are then coupled with both bed load and suspended load transport descriptions, which drive resultant morphology of the bed. The present numerical model is validated against a laboratory experiment of flow and morphological change induced by a solitary wave. The rigid-bed simulation illustrates that the numerical model can reasonably reproduce the characteristic sequences as observed in the experiment, including the wave shoaling, breaking, runup, rundown, hydraulic jump and trailing wave. The quantitative agreement between computed and measured results, including surface elevation, bed shear stress, and turbulent kinetic energy are satisfactory. The sediment-bed simulation demonstrates that the computed tendency of the bed profile evolution fits well with the measured results, showing the general pattern of both offshore deposition and onshore erosion. The deposition height is fairly well predicted, while the erosion depth is generally underestimated in the swash zone where the water depth is extremely thin. Overall, the results obtained from the present model are promising, especially considering the complexity of the coupled flow and morphological processes involved.

KW - Numerical modeling

KW - RANS

KW - Solitary wave

KW - Sediment transport

KW - Morphology

KW - Sloping beach

U2 - 10.1016/j.apor.2018.11.007

DO - 10.1016/j.apor.2018.11.007

M3 - Journal article

VL - 82

SP - 259

EP - 273

JO - Applied Ocean Research

JF - Applied Ocean Research

SN - 0141-1187

ER -