Study on Volume Correction Method for Free Surface Flow Analysis Using Density Function Method

Asai, Keisuke; Tsubogo, Koichi

doi:10.2208/jscejb.62.122

Cited by 5 publications

(3 citation statements)

References 7 publications

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“…Furthermore, to mitigate the blurry phenomenon of the gas-liquid interface caused by numerical diffusion, a volume correction method 15) is implemented. It should be noted that the volume correction method is specifically applied to free surface flow since numerical diffusion occurs within a gas-liquid interface in the surface flow with the high velocity.…”

Section: ) Numerical Methodsmentioning

confidence: 99%

Applications of 3d Numerical Model Considering Surface and Seepage Flows in Generalized Curvilinear Coordinate System

Qiyun PANG,

ONDA

2024

Journal of JSCE

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This study aims to refine a three-dimensional flow model in a generalized curvilinear coordinate system by incorporating a porous media approach to simulate simultaneously both surface and seepage flows. The accuracy and effectiveness of the model are verified through its application to three scenarios: a dam break process over permeable porous bed, open channel flows with bed suction and curved open channel flows over a deformed riverbed. The numerical results demonstrate that the model is capable of accurately predicting water surface and velocity distributions over the riverbed with the complex boundary.

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Section: ) Numerical Methodsmentioning

confidence: 99%

Applications of 3d Numerical Model Considering Surface and Seepage Flows in Generalized Curvilinear Coordinate System

Qiyun PANG,

ONDA

2024

Journal of JSCE

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“…The wall function method is used for the boundary condition of the fixed bed. To prevent the blurring phenomenon of the gas-liquid interface due to numerical diffusion, the volume correction is carried out, based on the reference 17) .…”

Section: Methodsmentioning

confidence: 99%

3d Numerical Simulation of Lateral Overtopping Flows in Curved Channel Using Boundary Fitted Coordinate System

PANG

Onda

2023

Journal of JSCE

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In the recent flood disaster, the remarkable water level rise in river flows over a short period led to the levee breaching, which caused severe damage in the landside region. Therefore, numerical methods that can predict flood flows and bed deformation around a levee are of great significance for flood mitigation. In this study, a three-dimensional (3D) numerical model of open channel flows in a boundary fitted coordinate system with the density function method is used, and by comparing the hydraulic characteristics of simulation, such as water level and velocity distributions, to the previous experiments of lateral overtopping flows around a side weir in the curved channel, the reliability of the numerical model is validated and threedimensional flow structures around side weir have also been investigated.

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“…The volume correction 11) is carried out to prevent diffusion of boundary between air and water phases.…”

Section: Numerical Methods (1) Flow Modelmentioning

confidence: 99%

Numerical Simulation of Dike Erosion Process Due to Overtopping Flow

et al. 2014

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Dike failures due to overtopping flows have recently occurred during floods. It is of great importance to understand the mechanism of dike failure processes and to predict dike erosion accurately for disaster mitigation. In this study, a numerical model to simulate dike breaching is developed based on a three-dimensional flow model in porous media and density function methods, and a non-equilibrium sediment transport model. Infiltration into a dike is also considered in the simulation. First, a numerical model is applied to flows over a solid embankment in order to validate the flow model. Then, dike erosion processes are simulated. Compared with the previous experimental results, it is shown that the numerical model can reproduce overflows and dike failure processes reasonably.

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Study on Volume Correction Method for Free Surface Flow Analysis Using Density Function Method

Cited by 5 publications

References 7 publications

Applications of 3d Numerical Model Considering Surface and Seepage Flows in Generalized Curvilinear Coordinate System

Applications of 3d Numerical Model Considering Surface and Seepage Flows in Generalized Curvilinear Coordinate System

3d Numerical Simulation of Lateral Overtopping Flows in Curved Channel Using Boundary Fitted Coordinate System

Numerical Simulation of Dike Erosion Process Due to Overtopping Flow

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