Numerical investigation of sheet flow driven by a near-breaking transient wave using SedFoam

Delisle, Marie‐Pierre C.; Kim, Yeulwoo; Mieras, Ryan S.; Gallien, Timu W.

doi:10.1016/j.euromechflu.2022.07.002

Cited by 4 publications

(4 citation statements)

References 85 publications

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“…For both the gravel and sand cases, 𝐴𝐴 𝐴𝐴 𝑠𝑠 0 = 0.7 best matched the experimental data (see calibration below) which follows the relationship between packing density and porosity (D = 1 − η), and is chosen for further analysis. Notably, 𝐴𝐴 𝐴𝐴 𝑠𝑠 0 = 0.7 is slightly larger than the 0.6-0.64 values typically used in SedFoam and SedWaveFoam numerical modeling (e.g., Chauchat et al, 2017;Delisle et al, 2022;Kim et al, 2018Kim et al, , 2019Kim et al, , 2021. These previous studies assumed uniform packing of perfectly spherical particles; heterogeneity (e.g., in shape or size) reduces pore space, reflecting as in increase in ϕ s .…”

Section: 1029/2022jc019615mentioning

confidence: 84%

A Numerical Study of Dam‐Break Driven Swash and Beach Groundwater Interactions

Delisle,

Kim,

Gallien

2023

JGR Oceans

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The dynamic interaction between swash and beach groundwater is fundamental to understanding wave runup and sediment transport processes. A numerical model that simultaneously resolves free surface and porous media flow for a variably saturated subsurface is presented. The novel numerical model, SedOlaFlow, is developed by merging the existing two‐phase, Eulerian sediment transport model, SedWaveFoam, with the surface wave solver, olaFlow. SedOlaFlow is validated with large wave flume surface and subsurface data for dam‐break driven swash over permeable gravel and sand beaches. Sediment size significantly impacts the swash‐groundwater relationship through infiltration/exfiltration and subsurface processes which modulate runup. Model results demonstrate that vertical infiltration into the upper unsaturated beach leads to a delayed groundwater table response to swash in the sand beach. Pressure fluctuations in the sand beach are not directly indicative of the swash depth or groundwater table and exfiltration may occur even when the swash depth is non‐zero. Groundwater circulation induced by a single swash event is non‐uniform and highly dynamic in the variably saturated vadose zone. Elevated ambient groundwater levels generally increase swash extent and duration. These findings establish the existence of a bi‐directional relationship between swash and groundwater flows and have significant implications on the effects of sea level rise on coastal flooding.

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Section: 1029/2022jc019615mentioning

confidence: 84%

A Numerical Study of Dam‐Break Driven Swash and Beach Groundwater Interactions

Delisle,

Kim,

Gallien

2023

JGR Oceans

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“…The solver includes the most recent developments for intergranular stress modeling such as the kinetic theory for granular flows (Chassagne et al, 2023) and the µ(I) rheology (Boyer et al, 2011), turbulence closure models such as mixing length (Revil-Baudard and Chauchat, 2013), k − ε (Hsu et al, 2004), k − ω (Amoudry, 2014;Nagel et al, 2020), and large-eddy simulation (Mathieu et al, 2021) models. SedFoam has been validated using many benchmarks (Chauchat et al, 2017) and successfully applied to various practical configurations such as scour applications (Mathieu et al, 2019;Nagel et al, 2020;Tsai et al, 2022), ripple migration and geometry evolution (Salimi-Tarazouj et al, 2021a, b), sheet flow in an oscillatory boundary layer (Delisle et al, 2022;Mathieu et al, 2022) or immersed granular avalanches (Montellà et al, 2021(Montellà et al, , 2023.…”

Section: Introductionmentioning

confidence: 99%

sedInterFoam 1.0: a three-phase numerical model for sediment transport applications with free surfaces

Mathieu,

Kim,

Hsu

et al. 2024

Preprint

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Abstract. In this paper, an Eulerian two-phase-flow model sedFoam is extended to include an air phase together with the water and sediment phases. The numerical model called sedInterFoam is implemented using the open source library OpenFOAM. SedInterFoam includes the previous features of sedFoam for sediment transport modeling and also solves the air/water interface using the volume of fluid method coupled with the waves2Foam toolbox for free surface wave generation and absorption. Using sedInterFoam, four test cases are successfully reproduced to validate the free-surface evolution algorithm implementation, mass conservation of sediment and fluid phases, predictive capabilities and demonstrate its potential in modelling a broader range of coastal applications with sediment transport dominated by surface waves.

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“…It has been shown that within the bottom boundary layer, the viscoplastic rheological properties of the dense muddy mixture reduce the turbulent kinetic energy by increasing dissipation [12]. Likewise, the stable stratification resulting from wave-induced resuspension of bottom sediments has been seen to both damp turbulent kinetic energy and reduce the bed shear stress [13]. The interaction between this damping and the turbulent resuspension and transport of muddy sediment is not yet fully understood, but recent research has indicated a strong relationship between small scale turbulence in the bottom boundary layer and the movement of fine muddy sediment [14,15].…”

Section: Introductionmentioning

confidence: 99%

A Bingham Plastic Fluid Solver for Turbulent Flow of Dense Muddy Sediment Mixtures

Adams

Simeonov

Bateman

et al. 2023

Fluids

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We have developed and tested a numerical model for turbulence resolving simulations of dense mud–water mixtures in oscillatory bottom boundary layers, based on a low Stokes number formulation of the two-phase equations. The resulting non-Boussinesq equation for the fluid momentum is coupled to a transport equation for the mud volumetric concentration, giving rise to a volume-averaged fluid velocity that is non-solenoidal, and the model was implemented as a new compressible flow solver. An oscillating pressure gradient force was implemented in the correction step of the standard semi-implicit method for pressure linked equations (SIMPLE), for consistency with the treatment of other volume forces (e.g., gravity). The flow solver was further coupled to a new library for Bingham plastic materials, in order to model the rheological properties of dense mud mixtures using empirically determined concentration-dependent yield stress and viscosity. We present three direct numerical simulation tests to validate the new MudMixtureFoam solver against previous numerical solutions and experimental data. The first considered steady flow of Bingham plastic fluid with uniform concentration around a sphere, with Bingham numbers ranging from 1 to 100 and Reynolds numbers ranging from 0.1 to 100. The second considered the development of turbulence in oscillatory bottom boundary layer flow, and showed the formation of an intermittently turbulent layer with peak velocity perturbations exceeding 10 percent of the freestream flow velocity and occurring at a distance from the bottom comparable to the Stokes boundary layer thickness. The third considered the effects of density stratification due to resuspended sediment on turbulence in oscillatory bottom boundary layer flow with a bulk Richardson number of 1×10−4 and a Stokes–Reynolds number of 1000, and showed the formation of a lutocline between 20 and 40 Stokes boundary layer depths. In all cases, the new solver produced excellent agreement with the previous results.

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Numerical investigation of sheet flow driven by a near-breaking transient wave using SedFoam

Cited by 4 publications

References 85 publications

A Numerical Study of Dam‐Break Driven Swash and Beach Groundwater Interactions

A Numerical Study of Dam‐Break Driven Swash and Beach Groundwater Interactions

sedInterFoam 1.0: a three-phase numerical model for sediment transport applications with free surfaces

A Bingham Plastic Fluid Solver for Turbulent Flow of Dense Muddy Sediment Mixtures

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