Three-dimensional numerical analysis of a dam-break using OpenFOAM

Sánchez-Cordero, Esteban; Gómez, Manuel; Castellet, Ernest Bladé i

doi:10.15514/ispras-2017-29(6)-20

Cited by 2 publications

(1 citation statement)

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“…In the dam break simulation, there are 2 fluids involved: Water and air inside the dam. OpenFOAM uses the Volume of Fluids (VoF) method to simulate this by solving the following equation [24];…”

Section: Methodsmentioning

confidence: 99%

Eulerian vs Lagrangian Method for Low Computational Resources: A Comparison of 2D Dam Break Case

Mahmudah

Morita

2023

Trends Sci

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It is well known that computational fluid dynamics has been challenging for low-computational-resourced students and researchers. In this study, we performed a 2D dam break simulation by Eulerian approach-finite volume method of OpenFOAM and Lagrangian approach-finite volume particle method (FVP) in a low-specification personal computer. We compared those approaches’ results qualitatively and quantitatively against experimental data and measured their simulation time for 6 different grid sizes. We compared the visualization results and their pressure and velocity using ParaView and VisIt. At the same time, a quantitative comparison was made by determining the waterfront position each time using the Tracker video analyzer. It was found that OpenFOAM resulted in better visualization results, lower error by 28 - 68 %, and more reasonable pressure and velocity profiles. It can also simulate smaller grid sizes and 10 to 200 times faster than FVP, but it can’t produce the air-liquid interface’s sharpness as good as FVP. Thus, to simulate cases where interfaces are not important, Eulerian-based OpenFOAM is best suited to perform in a low-specification computer. HIGHLIGHTS One of the main challenge in CFD is that it needs a huge computational resources to get optimum results. For students or researchers with limited computational resources, which approaches can they used? Two approaches in CFD: Eulerian and Lagrangian methods-represented by OpenFOAM and Finite Volume Particle Method (FVP)-were performed in a personal laptop to simulate 2D dam break problem and their results are compared with the experimental data Qualitative and quantitative comparison shows that OpenFOAM is well suited for low computational resources users. However, FVP method has an advantage in terms of capturing the interface of the two phases involved in simulation. Thus, for phase-change phenomena where interface is important, it is strongly recommended to use FVP-though one might need a more sophisticated resources than a personal laptop GRAPHICAL ABSTRACT

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Section: Methodsmentioning

confidence: 99%

Eulerian vs Lagrangian Method for Low Computational Resources: A Comparison of 2D Dam Break Case

Mahmudah

Morita

2023

Trends Sci

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Experimental and Numerical Investigation of Beach Slope Effects on the Hydrodynamic Loading of Tsunami-like Surges on a Vertical Wall

Liu

Nistor

Mohammadian

et al. 2022

JMSE

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Over the past decades, hydraulic surge generated by dam-break waves has been used to simulate the effects of tsunamis on coastal infrastructure. This study investigates the slope effects on hydrodynamic loading of dam-break waves on structure when propagating over four different inclined beds (0-, 5-, 10-, 15-degree) by experiment and numerical simulation using OpenFOAM and DualSPHysics. Except for small discrepancies in the pressure time-history, numerical results obtained with both OpenFOAM and DualSPHysics agreed closely with the experimental dynamic pressures. The results revealed that the hydrodynamic pressure decreased after an initial impact peak from the lowest transducers in the 5-, 10-, and 15-degree cases when compared with the horizontal case. However, the dynamic pressure of transducers at same corresponding level increased with an increase in the slope. The integrated experimental hydrodynamic forces were similar to the numerical results for the 0- and 5-degree cases, while they were higher for the 10- and 15-degree cases due to insufficient pressure data. By investigating the relation between the force decrease and slopes, a non-dimensional reduction factor was proposed from the linear fitness for slope effects estimation. This experimental and numerical study can provide novel insight on the hydrodynamic force calculation of tsunami-like surges on coastal infrastructures when considering beach slope.

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Three-dimensional numerical analysis of a dam-break using OpenFOAM

Cited by 2 publications

References 0 publications

Eulerian vs Lagrangian Method for Low Computational Resources: A Comparison of 2D Dam Break Case

Eulerian vs Lagrangian Method for Low Computational Resources: A Comparison of 2D Dam Break Case

Experimental and Numerical Investigation of Beach Slope Effects on the Hydrodynamic Loading of Tsunami-like Surges on a Vertical Wall

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