Smoothed Particle Hydrodynamics Simulations of Dam-Break Flows Around Movable Structures

Jian, Wei; Liang, Dongfang; Shao, Songdong; Chen, Ridong; Yang, Kejun

doi:10.17736/ijope.2016.ak08

Cited by 12 publications

(15 citation statements)

References 22 publications

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“…The total simulation time is 6 s. Figure 5a,b shows the time history of water depth variations at gauging point H2 and H4, compared between the present SWE-SPH computations and benchmark data of Kleefsman et al [21]. The agreement between the two is quite promising, which seems even better than the 3D WCSPH/ISPH computations carried out by Jian et al [22]. One possible reason could be that the present channel bed is rough, while this was not taken into consideration in the 3D ISPH model.…”

Section: Dam Break Flow Interaction With a Rectangular Obstaclementioning

confidence: 59%

“…To support this, for the dam break flow over a triangular hump [19], the present SWE-SPH computations are compared with the numerical results of Zhou et al [23] using a high-resolution Godunov-type cut-cell scheme. For the dam break flow over a rectangular obstacle [21], the VOF results of Kleefsman et al [21] and 3D ISPH results of Jian et al [22] are compared. [19], which demonstrate that the SWE-SPH computations are generally better than the numerical results of Zhou et al [23] especially at gauging points G10 and G13.…”

Section: Comparisons With Other Numerical Modeling Resultsmentioning

confidence: 99%

“…In the experiment the dam break was assumed to be instantaneous. Since the downstream obstacle occupies only a portion of the channel width, 3D simulations must be carried out if N-S equations are to be used, such as documented by Jian et al [22]. On the other hand, SPH solutions from the SWEs would provide a promising tool for such a purpose.…”

Section: Dam Break Flow Interaction With a Rectangular Obstaclementioning

confidence: 99%

“…Thus, the advantage of SWEs type model is that bed roughness can be easily and explicitly reflected in the model parameters while this may not be a simple issue in N-S type models. Also the present SWE-SPH used the CPU time in minutes, while the WCSPH/ISPH of Jian et al [22] used this in hours. The time history indicates that after the dam break flood wave reflects from the left boundary and reaches H2, the water depth there achieves the maximum value.…”

Section: Dam Break Flow Interaction With a Rectangular Obstaclementioning

confidence: 99%

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SWE-SPHysics Simulation of Dam Break Flows at South-Gate Gorges Reservoir

Zheng

Ren

et al. 2017

Water

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This paper applied a Smoothed Particle Hydrodynamics (SPH) approach to solve Shallow Water Equations (SWEs) to study practical dam-break flows. The computational program is based on the open source code SWE-SPHysics, where a Monotone Upstream-centered Scheme for Conservation Laws (MUSCL) reconstruction method is used to improve the Riemann solution with Lax-Friedrichs flux. A virtual boundary particle method is applied to treat the solid boundary. The model is first tested on two benchmark collapses of water columns with the existence of downstream obstacle. Subsequently the model is applied to forecast a prototype dam-break flood, which might occur in South-Gate Gorges Reservoir area of Qinghai Province, China. It shows that the SWE-SPH modeling approach could provide a promising simulation tool for practical dam-break flows in engineering scale.

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Section: Dam Break Flow Interaction With a Rectangular Obstaclementioning

confidence: 59%

Section: Comparisons With Other Numerical Modeling Resultsmentioning

confidence: 99%

Section: Dam Break Flow Interaction With a Rectangular Obstaclementioning

confidence: 99%

Section: Dam Break Flow Interaction With a Rectangular Obstaclementioning

confidence: 99%

See 2 more Smart Citations

SWE-SPHysics Simulation of Dam Break Flows at South-Gate Gorges Reservoir

Zheng

Ren

et al. 2017

Water

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“…Schwaiger's approach requires the inverse operations of the matrices H −1 ββ and Γ ij at each fluid particle, so it could cost a little more in computational expenses. The original formulation was developed for the thermal diffusion solutions, and Jian et al [36] used this for the fluid-structure interactions in their ISPH approach. Oger et al [37] studied a wide range of the correction procedures to improve the accuracy of kernel approximations and they proposed a renormalization technique from the discrete version of the Eulerian equations.…”

Section: Schwaiger Form Viscosity Force Model-03 (Visc-03)mentioning

confidence: 99%

Study on SPH Viscosity Term Formulations

Zheng

Shao

2018

Applied Sciences

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Featured Application: The proposed study contributes to the mesh-free numerical modeling field through the examinations of several viscosity term formulations. By simulating benchmark viscosity-dominated flows in engineering practice, the optimal viscosity scheme has been found to work with the Smoothed Particle Hydrodynamics (SPH) method.Abstract: For viscosity-dominated flows, the viscous effect plays a much more important role. Since the viscosity term in SPH-governing (Smoothed Particle Hydrodynamics) equations involves the discretization of a second-order derivative, its treatment could be much more challenging than that of a first-order derivative, such as the pressure gradient. The present paper summarizes a series of improved methods for modeling the second-order viscosity force term. By using a benchmark patch test, the numerical accuracy and efficiency of different approaches are evaluated under both uniform and non-uniform particle configurations. Then these viscosity force models are used to compute a documented lid-driven cavity flow and its interaction with a cylinder, from which the most recommended viscosity term formulation has been identified.

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A SPH numerical wave basin for modeling wave-structure interactions

Wen

Ren

Dong

et al. 2016

Applied Ocean Research

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. (2016). A SPH numerical wave basin for modeling wave-structure interactions. Applied Ocean Research, 59, 366-377. DOI: 10.1016/j.apor.2016 General rights Copyright and moral rights for the publications made accessible in Discovery Research Portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from Discovery Research Portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain.• You may freely distribute the URL identifying the publication in the public portal. Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Abstract: Based on a parallel SPH-LES model, a three dimensional numerical wave basin is developed to study wave interaction with coastal structures. The OpenMP programming technology combined with an existing MPI program contained in the parallel version of SPHYSICS code has been implemented to enable the simulation of hundred millions of particles running on a computer cluster. As part of the numerical basin development work an active absorbing wave maker and a sponge layer are introduced. The dynamic boundary conditions are also corrected to reduce the spurious effects. Wave generation and propagation in the numerical wave basin is first tested and confirmed with analytical results. Then, the model is applied to simulate wave interactions with a vertical breakwater and a vertical cylinder in order to further assess the capability of the numerical wave basin. The predicted free surface elevation near the vertical breakwater is compared with the experimental data while the horizontal forces and overturning moments acting on the vertical cylinder are verified with the analytical results. In all these cases the model results show excellent agreement with the validation data.

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Smoothed Particle Hydrodynamics Simulations of Dam-Break Flows Around Movable Structures

Cited by 12 publications

References 22 publications

SWE-SPHysics Simulation of Dam Break Flows at South-Gate Gorges Reservoir

SWE-SPHysics Simulation of Dam Break Flows at South-Gate Gorges Reservoir

Study on SPH Viscosity Term Formulations

A SPH numerical wave basin for modeling wave-structure interactions

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