Comparison of models for the simulation of landslide generated Tsunamis

Audusse, Emmanuel; Steinstraesser, Joao Guilherme Caldas; Emerald, Louis; Heinrich, Philippe; Paris, Alexandre; Parisot, Martin

doi:10.1051/proc/202107002

Cited by 5 publications

(4 citation statements)

References 16 publications

(31 reference statements)

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“…A switch between the two sets of equations allows to use the shallow water equations for a few instants during the water wave generation in the nearfield and the Boussinesq model for the far-field propagation. Indeed, Audusse et al (2021) showed that this combination of models improves the simulation of the generation process compared to using only the Boussinesq model.…”

Section: Depth-averaged Model: Avalanchementioning

confidence: 99%

Landslide tsunamis: Comparison between depth-averaged and Navier–Stokes models

Paris

Heinrich

Abadie

2021

Coastal Engineering

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Section: Depth-averaged Model: Avalanchementioning

confidence: 99%

Landslide tsunamis: Comparison between depth-averaged and Navier–Stokes models

Paris

Heinrich

Abadie

2021

Coastal Engineering

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“…Trees in the forest have been used as seismic shields given their properties as natural metamaterials (Colquitt et al, 2017;Sewar et al, 2022). The numerical calculation of (2D) models, which ignores information about the propagation in the third direction, may lead to the loss of an essential calculation point (Audusse et al, 2021). Through a three dimension (3D) simulation model, which is a type of engineering, numerical analysis can be used to represent the visibility of an urban forest in a way that effectively protects against low-frequency EWs (Huang et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Efficient numerical simulations on the forest barrier for seismic wave attenuation: engineering safe constructions

Al-Shami,

Huang,

Amran

et al. 2024

Front. Built Environ.

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This paper aims to elucidate the clear visibility of attenuating seismic waves (SWs) with forest trees as natural metamaterials known as forest metamaterials (FMs) arranged in a periodic pattern around the protected area. In analyzing the changeability of the FM models, five distinct cases of “metawall” configurations were considered. Numerical simulations were conducted to study the characteristics of bandgaps (BGs) and vibration modes for each model. The finite element method (FEM) was used to illustrate the generation of BGs in low frequency ranges. The commercial finite element code COMSOL Multiphysics 5.4a was adopted to carry out the numerical analysis, utilizing the sound cone method and the strain energy method. Wide BGs were generated for the Bragg scattering BGs and local resonance BGs owing to the gradual variations in tree height and the addition of a vertical load in the form of mass to simulate the tree foliage. The results were promising and confirmed the applicability of FEM based on the parametric design language ANSYS 17.2 software to apply the boundary conditions of the proposed models at frequencies below 100 Hz. The effects of the mechanical properties of the six layers of soil and the geometric parameters of FMs were studied intensively. Unit cell layouts and an engineered configuration for arranging FMs based on periodic theory to achieve significant results in controlling ground vibrations, which are valuable for protecting a large number of structures or an entire city, are recommended. Prior to construction, protecting a region and exerting control over FM characteristics are advantageous. The results exhibited the effect of the ‘trees’ upper portion (e.g., leaves, crown, and lateral bulky branches) and the gradual change in tree height on the width and position of BGs, which refers to the attenuation mechanism. Low frequency ranges of less than 100 Hz were particularly well suited for attenuating SWs with FMs. However, an engineering method for a safe city construction should be proposed on the basis of the arrangement of urban trees to allow for the shielding of SWs in specific frequency ranges.

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“…A non-dispersion model is still a common approach for practical purposes and in coastal applications because it has a computational cost that is 3 to 4 times lower than that of dispersion. An example is seen in the recent work of Audusse et al (2019), where both models were compared in simulating tsunami waves generated by a landslide, and was discovered that the non-dispersion model performs better than that of dispersion in the generation zone but conversely in the propagation zone. Moreover, the non-dispersion model produces much less computational cost in terms of complexity compared to that of dispersion.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation for One-Dimensional (1D) Wave Propagation by Solving the Shallow Water Equations using the Preissmann Implicit Scheme

Lidyana

Ginting

Yudianto

2022

jcef

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This research simulated one-dimensional wave propagation by solving the shallow water equations using the Preissman implicit numerical scheme due to its ability to maintain simplicity and stability at a larger time step value. This numerical model was fundamentally developed to satisfy the shallow water condition, where the water depth or horizontal-length scale is much smaller than the free-surface disturbance wavelength or vertical-length scale, and to comprehensively test the accuracy of the model. Consequently, three different types of waves were considered and these include (1) tidal, (2) roll, and (3) solitary. In the first case, the model was proven to be robust and accurate due to its relatively-small errors for both water-surface elevation and velocity indicating that the Preismann scheme is suitable for longwave simulations. In the second case, it was fairly accurate in capturing the periodic permanent roll waves despite showing a higher water-surface elevation than the one observed and this discrepancy is due to the neglect of the turbulent Reynold stress in the model. Meanwhile, the last case showed remarkable discrepancies in the water-surface elevation because the dispersion effect is quite significant during the wave propagation. This indicates that the Preismann scheme underestimated the wave crest along with time when the dispersion term was neglected. All simulations were performed using the tridiagonal matrix algorithm, thereby eliminating the need for iterations for the solution of the Preismann scheme. The findings of this study are beneficial to the next generation of the Preissmann-scheme models which can be designed to include turbulence and dispersion terms.

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Comparison of models for the simulation of landslide generated Tsunamis

Cited by 5 publications

References 16 publications

Landslide tsunamis: Comparison between depth-averaged and Navier–Stokes models

Landslide tsunamis: Comparison between depth-averaged and Navier–Stokes models

Efficient numerical simulations on the forest barrier for seismic wave attenuation: engineering safe constructions

Numerical Simulation for One-Dimensional (1D) Wave Propagation by Solving the Shallow Water Equations using the Preissmann Implicit Scheme

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