Modelling of the landslide-induced impulse waves in the Artvin Dam reservoir by empirical approach and 3D numerical simulation

Ersoy, Hakan; Karahan, Murat; Gelişli, Kenan; Akgün, Aykut; Anilan, Tuğçe; Sünnetci, Muhammet Oğuz; Yahşi, Bilgehan Kul

doi:10.1016/j.enggeo.2018.12.025

Cited by 45 publications

(10 citation statements)

References 23 publications

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“…With the development of computer science, numerical simulations based on Computational Fluid Dynamics (CFD) codes (e.g., Flow-3D(Three-Dimensional), Fluent) have been wildly used. The simulation results have been proved to be consistent with experimental results [21][22][23][24][25][26][27][28][29][30]. For tandem piers, Palau-Salvador et al [31] conducted numerical simulations around two submerged tandem piers and presented flow streamlines at different planes.…”

supporting

confidence: 68%

Numerical Simulation of Velocity Field around Two Columns of Tandem Piers of the Longitudinal Bridge

Zheng

Zhang

2020

Fluids

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This research explores the effects of different spans of two columns of tandem piers on the characteristics of x-velocity near the river bed based on computational fluid dynamics (CFD) simulations. With a span shorter than 27.5D (D is the diameter of piers), the shape and the lateral range of the x-velocity increases with the increase of distance downwards the x-direction. For the area between the tandem piers and the wall, the VRi/VR1 (the ratio of the x-velocity at the i-th row to the x-velocity of the first row in each model) near the wall increases up to 1.26. For the area between the two columns of tandem piers, the profile of VRi/VR1 changes from a “∩-shape” to an “M-shape” in each model. RAVC (average velocity change ratio) of different spans increases gradually and tends to be stable with the increases of the span. The largest RAVC is about −17.66% with a span of 0.52 m. The RMV (the ratio of the maximum x-velocity among piers in each row in different models to the maximum x-velocity of the two piers arranged side by side) of piers in the first row of different models is around 0.95. The RMV becomes 0.82 at the second pier in each model when the span is shorter than 27.5D, and increases to 0.91 if the span is longer than 27.5D. If the span is longer than 27.5D, the RMV of different piers are close to each other from the 2nd pier to the last one.

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supporting

confidence: 68%

Numerical Simulation of Velocity Field around Two Columns of Tandem Piers of the Longitudinal Bridge

Zheng

Zhang

2020

Fluids

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“…To compute turbulence and viscosity processes in Flow-3D, the renormalized group model-based k-epsilon turbulence model [34] is applied to create a fluid-fluid coupled model of the impulse wave. This model uses statistical formulations to compute the turbulent kinetic energy dissipation rate [35][36][37]. A Newtonian-like fluid (see Section 4), featuring a higher density compared to the still-water density, is adopted to simulate the impacting volume [38].…”

Section: Methodsmentioning

confidence: 99%

Geometry-Based Preliminary Quantification of Landslide-Induced Impulse Wave Attenuation in Mountain Lakes

et al. 2021

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In this work, a simple methodology for preliminarily assessing the magnitude of potential landslide-induced impulse waves’ attenuation in mountain lakes is presented. A set of metrics is used to define the geometries of theoretical mountain lakes of different sizes and shapes and to simulate impulse waves in them using the hydrodynamic software Flow-3D. The modeling results provide the ‘wave decay potential’, a ratio between the maximum wave amplitude and the flow depth at the shoreline. Wave decay potential is highly correlated with what is defined as the ‘shape product’, a metric that represents lake geometry. The relation between these two parameters can be used to evaluate wave dissipation in a natural lake given its geometric properties, and thus estimate expected flow depth at the shoreline. This novel approach is tested by applying it to a real-world event, the 2007 landslide-generated wave in Chehalis Lake (Canada), where the results match well with those obtained using the empirical equation provided by ETH Zurich (2019 Edition). This work represents the initial stage in the development of this method, and it encourages additional research and modeling in which the influence of the impacting characteristics on the resulting waves and flow depths is investigated.

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“…This model has been improved by the addition of one "ε" extra term for evaluating fast stressed flows and flows across surfaces with a wide range of geometric changes, and it is particularly useful in transient flow simulations [25]. In addition, relying on the comparison made between turbulence models over spillways using Flow-3D conducted by Zhan et al (2010), the Re-Normalization Group turbulence model has had more accurate results than other turbulence models, and it has therefore been used in the present study [26,27]. The fluid is also defined, non-viscous, and incompressible, and the air inlet was considered with a density of 1.24 kg/m 3 and a shear stress rate of 0.0731.…”

Section: Methodsmentioning

confidence: 99%

Numerical Modeling of Failure Mechanisms in Articulated Concrete Block Mattress as a Sustainable Coastal Protection Structure

et al. 2021

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Shoreline protection remains a global priority. Typically, coastal areas are protected by armoring them with hard, non-native, and non-sustainable materials such as limestone. To increase the execution speed and environmental friendliness and reduce the weight of individual concrete blocks and reinforcements, concrete blocks can be designed and implemented as Articulated Concrete Block Mattress (ACB Mat). These structures act as an integral part and can be used as a revetment on the breakwater body or shoreline protection. Physical models are one of the key tools for estimating and investigating the phenomena in coastal structures. However, it does have limitations and obstacles; consequently, in this study, numerical modeling of waves on these structures has been utilized to simulate wave propagation on the breakwater, via Flow-3D software with VOF. Among the factors affecting the instability of ACB Mat are breaking waves as well as the shaking of the revetment and the displacement of the armor due to the uplift force resulting from the failure. The most important purpose of the present study is to investigate the ability of numerical Flow-3D model to simulate hydrodynamic parameters in coastal revetment. The run-up values of the waves on the concrete block armoring will multiply with increasing break parameter (0.5<ξm−1,0<3.3) due to the existence of plunging waves until it (Ru2%Hm0=1.6) reaches maximum. Hence, by increasing the breaker parameter and changing breaking waves (ξm−1,0>3.3) type to collapsing waves/surging waves, the trend of relative wave run-up changes on concrete block revetment increases gradually. By increasing the breaker index (surf similarity parameter) in the case of plunging waves (0.5<ξm−1,0<3.3), the low values on the relative wave run-down are greatly reduced. Additionally, in the transition region, the change of breaking waves from plunging waves to collapsing/surging (3.3<ξm−1,0<5.0), the relative run-down process occurs with less intensity.

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Modelling of the landslide-induced impulse waves in the Artvin Dam reservoir by empirical approach and 3D numerical simulation

Cited by 45 publications

References 23 publications

Numerical Simulation of Velocity Field around Two Columns of Tandem Piers of the Longitudinal Bridge

Numerical Simulation of Velocity Field around Two Columns of Tandem Piers of the Longitudinal Bridge

Geometry-Based Preliminary Quantification of Landslide-Induced Impulse Wave Attenuation in Mountain Lakes

Numerical Modeling of Failure Mechanisms in Articulated Concrete Block Mattress as a Sustainable Coastal Protection Structure

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