Journal ArticleDOI
An incompressible SPH method for simulation of unsteady viscoelastic free-surface flows
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In this article, an incompressible smoothed particle hydrodynamics (SPH) method is presented to solve unsteady free-surface flows with both Newtonian and viscoelastic fluids.Abstract:
In this paper, an incompressible smoothed particle hydrodynamics (SPH) method is presented to solve unsteady free-surface flows. Both Newtonian and viscoelastic fluids are considered. In the case of viscoelastic fluids, both the Maxwell and Oldroyd-B models are investigated. The proposed SPH method uses a Poisson pressure equation to satisfy the incompressibility constraints. The solution algorithm is an explicit predictor-corrector scheme and employs an adaptive smoothing length based on density variations. To alleviate the numerical difficulties encountered when fluid is highly stretched, an artificial stress term is incorporated into the momentum equation which reduces the risk of unrealistic fractures in the material. Two challenging test cases, the impacting drop and the jet buckling problems, are solved to demonstrate the capability of the proposed scheme in handling viscoelastic flows with complex free surfaces. The jet buckling test case was solved for a wide range of Weissenberg numbers. It was shown that in all cases the method is stable and fairly accurate and agrees well with the available data.read more
Citations
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Journal ArticleDOI
Discrete viscous threads
TL;DR: In this paper, a continuum-based discrete model for thin threads of viscous fluid by drawing upon the Rayleigh analogy to elastic rods is presented, demonstrating canonical coiling, folding, and breakup in dynamic simulations.
Journal ArticleDOI
An SPH projection method for simulating fluid-hypoelastic structure interaction
Ashkan Rafiee,Krish Thiagarajan +1 more
TL;DR: In this paper, an incompressible Smoothed Particle Hydrodynamics (SPH) method is proposed for simulation of fluid-structure interaction problems, deploying the pressure Poisson equation to satisfy incompressibility constraints.
Journal ArticleDOI
Smoothed particle hydrodynamics (SPH) for complex fluid flows: Recent developments in methodology and applications
Journal ArticleDOI
Improved Incompressible Smoothed Particle Hydrodynamics method for simulating flow around bluff bodies
TL;DR: In this paper, numerical solutions for flow over an airfoil and a square obstacle using Incompressible Smoothed Particle Hydrodynamics (ISPH) method with an improved solid boundary treatment approach, referred to as the Multiple Boundary Tangents (MBT) method.
Proceedings ArticleDOI
Accurate viscous free surfaces for buckling, coiling, and rotating liquids
Christopher Batty,Robert Bridson +1 more
TL;DR: A fully implicit Eulerian technique for simulating free surface viscous liquids which eliminates artifacts in previous approaches, efficiently supports variable viscosity, and allows the simulation of more compelling viscous behaviour than previously achieved in graphics is presented.
References
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Journal ArticleDOI
Smoothed particle hydrodynamics: Theory and application to non-spherical stars
R. A. Gingold,Joseph J Monaghan +1 more
Journal ArticleDOI
A numerical approach to the testing of the fission hypothesis.
TL;DR: A finite-size particle scheme for the numerical solution of two-and three-dimensional gas dynamical problems of astronomical interest is described and tested in this article, which is then applied to the fission problem for optically thick protostars.
Journal ArticleDOI
Smoothed particle hydrodynamics.
TL;DR: In this paper, the theory and application of Smoothed particle hydrodynamics (SPH) since its inception in 1977 are discussed, focusing on the strengths and weaknesses, the analogy with particle dynamics and the numerous areas where SPH has been successfully applied.
Journal ArticleDOI
Simulating Free Surface Flows with SPH
TL;DR: In this paper, the SPH (smoothed particle hydrodynamics) method is extended to deal with free surface incompressible flows, and examples are given of its application to a breaking dam, a bore, the simulation of a wave maker, and the propagation of waves towards a beach.
Journal ArticleDOI
Modeling Low Reynolds Number Incompressible Flows Using SPH
TL;DR: In this article, the smoothed particle hydrodynamics (SPH) method is extended to model incompressible flows of low Reynolds number, and the results show that the SPH results exhibit small pressure fluctuations near curved boundaries.
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