Development of FTCS Artificial Dissipation for Dam Break 2D Modelling

Mellivera, Avis; Zain, Khilmi; Adityawan, Mohammad Bagus; Harlan, Dhemi; Yakti, Bagus Pramono

doi:10.5614/jts.2020.27.1.1

Cited by 4 publications

(1 citation statement)

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“…The Mac Cormack scheme was chosen because it has the best accuracy base on a study conducted by [5][11] [12]. Hansen Numerical Filter chosen to reduce the oscillation and help stabilize the numerical model [8][13] [14]. For the experiment case, a dam break through a sloped channel and single building is chosen, which was conducted and studied by [15].…”

Section: Introductionmentioning

confidence: 99%

Building Treatments in Numerical Modeling of Dam Break Induced Flow in Urban Area

Sandi,

Adityawan,

Nurendyastuti

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Dam break is one of the most dangerous disasters, which cause a large mass of water from the reservoir is suddenly released to the downstream. Although dam break events are still rare, the occurrences can cause severe damage to the downstream area, especially if the downstream is an urban area. Urban flood due to dam break has a different characteristic compared to the flood in nature. Modeling the flood is good way to learn the urban flood characteristic. Therefore, further studies are needed to develop an urban dam break model. Numerical modeling is one of the most effective methods to simulate the flood. In numerical modeling, buildings can be modeled with 3 approaches, as a wall boundary, as an area with high manning value, and as a contour. This paper discusses about two-dimensional flow of a dam break which flows through a sloping channel and single building, particularly comparing 3 approaches to modeled the building. The case is based on laboratory experiment of previous study. The model was developed with 2D Shallow Water Equations (SWE) which are based on the conservation of mass and momentum derived from Navier Stokes equation. The equations then discretized using Mac-Cormack numerical scheme. Numerical filter is used to reduce the numerical instability or oscillation in the model. The numerical model results are then compared to the experimental result from previous study. The accuracy of the numerical model was checked using Root Mean Square Error (RMSE) to determine the best methods to modeled the building. The results indicate that modeling the building as a wall boundary have the best results with lowest RMSE value and also shown the closest comparison of water level compared to the experimental results. By conducting this study, it is hoped to assist the urban dam break modeling in the future.

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Section: Introductionmentioning

confidence: 99%

Building Treatments in Numerical Modeling of Dam Break Induced Flow in Urban Area

Sandi,

Adityawan,

Nurendyastuti

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Numerical modeling of dam break induced flow through multiple buildings in an idealized city

Adityawan¹,

Sandi²,

Harlan³

et al. 2023

Results in Engineering

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Comparison of Taylor Galerkin and FTCS models for dam-break simulation

Hafiyyan¹,

Adityawan

Harlan

et al. 2021

IOP Conf. Ser.: Earth Environ. Sci.

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The aim of this paper is to compare the ability of two numerical models to simulate two-dimensional dam-break flows. Dam-break modelling is important in reducing the high-risk of dam failure by determining the water flow movement and its effect on buildings downstream. In this study, the Taylor Galerkin and Forward Time Central Space method is presented to simulate 2-D dam-break flow. The Hansen filter is applied to both methods to reduce numerical instability oscillations in the model. The filters were used for each time step at each computing point. The model is verified by comparing the result simulation with numerical results from previous studies. The result show that Taylor Galerkin numerical scheme with Hansen filter is successful to simulate the problem of 2-D dam-break. Also, the Taylor Galerkin model has better results than the FTCS model. Studies like this are needed for mitigation efforts in the event of dam failure.

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Development of FTCS Artificial Dissipation for Dam Break 2D Modelling

Cited by 4 publications

References 0 publications

Building Treatments in Numerical Modeling of Dam Break Induced Flow in Urban Area

Building Treatments in Numerical Modeling of Dam Break Induced Flow in Urban Area

Numerical modeling of dam break induced flow through multiple buildings in an idealized city

Comparison of Taylor Galerkin and FTCS models for dam-break simulation

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