Bed stress assessment under solitary wave run-up

Adityawan, Mohammad Bagus; Tanaka, Hitoshi

doi:10.5047/eps.2011.02.012

Cited by 16 publications

(12 citation statements)

References 28 publications

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“…A numerical Hansen Filter (1962) was also adopted in the dam-break modeling of this study (Adityawan and Tanaka, 2012;Zendrato, et al, 2019;Maitsa, et al, 2019) to reduce the numerical instability or oscillation caused by the shock wave in the downstream of the dam in the calculation. The filter acted as an artificial dissipation and applied at each time step of each node.…”

Section: Continuitymentioning

confidence: 99%

“…This study was conducted by investigating the FTCS (Forward Time Central Space) numerical scheme to determine the movement of water flow and its effect on the downstream area causing dam break. Moreover, Hansen Filter was used to reduce the numerical instability or oscillation in the model as observed in Adityawan and Tanaka (2012) and Zendrato, et al (2019). The study aimed to determine the application of the FTCS numerical scheme to the problem of a simple dam break and a dam break coupled with column interaction.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

2D Shallow Water Model for Dam Break and Column Interactions

Putri

Iskandar

Adityawan

et al. 2020

Journal of the Civil Engineering Forum

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Dam break causes disastrous effects on the surrounding area, especially at the downstream, therefore, there is a need for accurate and timely predictions of dam break propagation to prevent both property damage and loss of life. This study aimed to determine the movement of dam-break flow in the downstream area by solving the Shallow Water Equations (SWE) or Saint Venant Equations which are based on the conservation of mass and momentum derived from Navier Stokes equation. The model was generated using a finite difference scheme which is the most common and simplest method for dam-break modeling while Forward Time Central Space (FTCS) numerical scheme was applied to simulate two-dimensional SWE. Moreover, the accuracy of the numerical model was checked by comparing its results with the analytic results of one-dimensional cases and a relatively small value of error was found in comparison to the analytic models as indicated with the RMSE values close to 0. The numerical to the two-dimensional models were also compared to a simple dam break in a flume and dam break with column interactions and the wave propagation in both cases was observed to become very close at a certain time. The model, however, used numerical filter (Hansen) to reduce the oscillations or numerical instability. The simulation and analysis, therefore, showed the ability of the numerical scheme of FTCS to resolve both cases of the simple dam break and dam break with column interactions in the Two-dimensional Shallow Water.

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Section: Continuitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

2D Shallow Water Model for Dam Break and Column Interactions

Putri

Iskandar

Adityawan

et al. 2020

Journal of the Civil Engineering Forum

Self Cite

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“…A numerical filter from Hansen [19] is used to handle shock and improve the model stability. The filter has been successfully used in a finite difference model as in [20].…”

Section: Simplicitymentioning

confidence: 99%

Application of Numerical Filter to a Taylor Galerkin Finite Element Model for Movable Bed Dam Break Flows

Harlan¹

2019

GEOMATE

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The dam break-induced propagation over a movable bed has given strong interest in numerical modeling. The shock wave, generally found in the wavefront, is a challenge in numerical modeling since this condition often leads to numerical instability. Additionally, the scouring beneath the wave requires coupling of hydraulic and sediment transport models. The objective of this research is to develop a one-dimensional model based on a finite element method to simulate an experimental case of a dam break-induced flow and the bed scouring beneath it. The two-step Taylor Galerkin scheme is used to solve the governing equations. In addition, Hansen numerical filter is used to handle shock wave and to increase the numerical stability of the developed model. The results show good agreement to the experimental data. Additionally, the applied numerical filter is able to reduce oscillation and improve the stability of the model.

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“…Boundary-layer approaches provide better information regarding bed stress, particularly since they are also valid for unsteady flows. In this study, a simulation of wave run-up is carried out by simultaneous coupling of the SWE model with the k-ω model by Adityawan, et al [23] The k-ω model is used near the flow boundary at the bottom, only for assessing the boundary layer shear stress. Free stream velocity and calculations of the free surface evolution are obtained from the SWE model.…”

Section: Criteria Of Seawall Designsmentioning

confidence: 99%

Formation of Beach Profile with the Design Criteria of Seawalls

Luo¹

2014

cea

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When wave energy builds up, beach berm and even dunes are quickly eroded with this material being removed offshore to form a bar parallel to the beach. It proceeds seawards during the course of the storm to reach some ultimate location prior to being dismantled and moved back to the beach by subsequent swell. There is difficulty in defining the steepness associated with storm, although it has commonly been accepted that steeper waves often produce a bar or a barred beach bar position and its crest height for a given storm condition. Therefore, criteria for the formation of bar and berm profiles respectively, need to be clarified.. In this paper, the available experimental data of large wave tank (LWT) from U.S. Army Crops of Engineering and Japanese Central Research Institute of Electric Power Industry are used to construct a new relationship. Finally, criteria for bar and berm formation and seawalls design are found, and new criteria form are quite simple and widely applicable.

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Bed stress assessment under solitary wave run-up

Cited by 16 publications

References 28 publications

2D Shallow Water Model for Dam Break and Column Interactions

2D Shallow Water Model for Dam Break and Column Interactions

Application of Numerical Filter to a Taylor Galerkin Finite Element Model for Movable Bed Dam Break Flows

Formation of Beach Profile with the Design Criteria of Seawalls

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