A weakly compressible MPS method for modeling of open‐boundary free‐surface flow

Shakibaeinia, Ahmad; Jin, Yee‐Chung

doi:10.1002/fld.2132

Cited by 186 publications

(152 citation statements)

References 27 publications

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“…Later Lastiwka et al (2009) developed a WCSPH model for the imposition of permeable boundary conditions for the gas dynamics. Moreover, Shakibaeinia and Jin (2010) and Federico et al (2012) used different particle recycling techniques for more practical open channel hydraulics. Gotoh et al (2001) developed a novel soluble wall concept to generate the inflows and simulated a free turbulent jet by using the Moving Particle Semi-implicit (MPS) model.…”

Section: Introductionmentioning

confidence: 99%

Incompressible SPH simulation of open channel flow over smooth bed

Tan

Cheng

Xie

et al. 2015

Journal of Hydro-environment Research

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The Smoothed Particle Hydrodynamics (SPH) modelling techniques are used in a variety of coastal hydrodynamic applications, but only limited works have been documented in the open channel flows. In this paper, we use the incompressible SPH model combined with an improved inflow boundary scheme to investigate the open channel flows in a laboratory scale. The inflow and outflow boundary conditions are treated by generating and removing the fluid particles at the channel end. The proposed ISPH model has been applied to the open channel laminar and turbulent flows of different flow depths and the computational results have been verified against the analytical solutions. Model convergence has been investigated through the numerical tests using different particle spacings and time steps. The artificial boundary drag force of numerical nature has been found under certain flow conditions. As further application of the model, two additional tests are also carried out, involving alternative solid boundary treatment and more complex channel topography. The present study could provide useful information on further exploitation of the SPH modelling technique in river hydrodynamics.

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Section: Introductionmentioning

confidence: 99%

Incompressible SPH simulation of open channel flow over smooth bed

Tan

Cheng

Xie

et al. 2015

Journal of Hydro-environment Research

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“…The term κ ρλn * i 2d∆t 2 is however too small to have any practical effect. As the speed of sound is very large in relation to the actual maximum particle speed during the simulations, |u| max , it has been suggested to use c = 10|u| max [47,48]. This weak compressibility term may be further simplified either as a constant, hence n…”

Section: Additional Stabilisation As Local Weak Compressibilitymentioning

confidence: 99%

“…In the original form presented in [17], the viscous forces applied to the velocity field (irrotational field) are solved explicitly while the pressure (solenoidal field) is solved implicitly, hence giving rise to the name of the method. While this approach is generally preferred in the literature, the pressure can also be solved explicitly by using an equation of state [47,48], thus improving computational performance in certain classes of problems. In the present study a fully implicit approach is developed, which is favourable in cases of small spatial discretisations since the limiting stability criteria (viscous terms) on the time step is related to h −2 , where h is the spatial discretisation size.…”

Section: Introductionmentioning

confidence: 99%

Computational haemodynamics of small vessels using the Moving Particle Semi-implicit (MPS) method

Gambaruto

2015

Journal of Computational Physics

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General rightsThis document is made available in accordance with publisher policies. Please cite only the published version using the reference above. AbstractThe simulation of whole blood stands as a complex multi-body problem. The Moving Particle Semi-implicit method, a Lagrangian particle method to solve the incompressible Navier-Stokes (NS) equations, is developed to perform simulations in complex periodic domains. Red blood cells are modelled using the spring network approach, that act as body force terms in the NS equations. Detailed presentation and derivation of both the MPS method and different spring network models is given. An adaptive time step and an implicit scheme are adopted, improving the stability and overall computational efficiency.The findings from the simulations show evidence that in proximity to the vessel wall, the red blood cells expose a larger surface area by orientation and deformation, due to the presence of a high velocity gradient. The greatest membrane internal stresses occur in the core region of the flow. The intra-cell interaction is driven by a complex flow field that can be visualised in a Lagrangian framework, and highlights vortex structures in the wakes and in between the cells. The stresses the blood exerts on the vessel wall is influenced by this complex flow field and by the presence of red blood cells.

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“…128,129) The difference between the SPH and MPS method is the methodology of spatial discretization; superposition of the kernels is used in the SPH and differences between particles are used in the MPS method. Actually, various mixtures have been developed and are being used at this time; for example, the viscosity term in the SPH is usually discretized by the mixture of the derivative of the kernel and the difference between the particles.…”

Section: Speed-up Of Particle Simulationmentioning

confidence: 99%

Current Achievements and Future Perspectives on Particle Simulation Technologies for Fluid Dynamics and Heat Transfer

Koshizuka

2011

J. Nucl. Sci. Technol.

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The Moving Particle Semi-implicit (MPS) method is one of the particle methods in which continuum mechanics is analyzed using the concept of particles. Since meshes are not used, large deformation of free surfaces and material interfaces can be simulated without the problems of mesh distortion. Thus, the MPS method has been applied to multiphase flow analysis in nuclear engineering. The advantages of the particle methods are also useful for applications in other engineering fields: ship engineering, civil engineering, microflow, biomechanics, visualization, etc. In this review, calculation examples are described and classified. Commercial codes have been released and applied in industries. The particle methods are also used in TV programs, movies, and computer games. Combinations of numerical techniques for multiphysics problems, fast calculations, and high-quality visualizations are expected to lead to real-time particle simulations for various new applications in the near future.

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A weakly compressible MPS method for modeling of open‐boundary free‐surface flow

Cited by 186 publications

References 27 publications

Incompressible SPH simulation of open channel flow over smooth bed

Incompressible SPH simulation of open channel flow over smooth bed

Computational haemodynamics of small vessels using the Moving Particle Semi-implicit (MPS) method

Current Achievements and Future Perspectives on Particle Simulation Technologies for Fluid Dynamics and Heat Transfer

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