The shape modeling technique based on the implicit surface representation is used for generating threedimensional surface models that interpolate given sets of scattered points. A number of techniques for generating interpolating surfaces have been proposed and significant progress has been made in the last decade [1]. In addition, the implicit surface representation is also useful for interact...

Standard formulations of smoothed particle hydrodynamics (SPH) are unable to resolve mixing at fluid boundaries. We use an error and stability analysis of the generalized SPH equations of motion to prove that this is due to two distinct problems. The first is a leading order error in the momentum equation. This should decrease with an increasing neighbour number, but does not because numerical ...

By modeling mass transfer phenomena, we simulate solids and liquids dissolving or changing to other substances. We also deal with the very small-scale phenomena that occur when a fluid spreads out at the interface of another fluid. We model the pressure at the interfaces between fluids with Darcy’s Law and represent the viscous fingering phenomenon in which a fluid interface spreads out with a ...

Abstract Engineered cementitious composites (ECC), also known as bendable concrete, were developed based on engineering the interactions between fibers and matrix. The orientation of fibers, in this regard, is one major factors influencing ductile behavior material. In study, fiber distributions ECC beams influenced by different casting techniques are evaluated via numerical modeling process. T...

This paper presents the implementation of an adaptive smoothed particle hydrodynamics (ASPH) method for high strain Lagrangian hydrodynamics with material strength. In ASPH, the isotropic kernel in the standard SPH is replaced with an anisotropic kernel whose axes evolve automatically to follow the mean particle spacing as it varies in time, space, and direction around each particle. Except for...

We present a novel method for creating small scale details as splashes and foam for Smoothed Particle Hydrodynamics (SPH) simulations. In our technique, each fluid particle can become a source emitter of splash particles. The probability of emission is controlled by density decay and velocity of fluid particles. Splash particles are uncoupled, collide only with obstacles and follow only ballist...

This work is an attempt to use the standard Smoothed Particle Hydrodynamics methodology for the simulation of the complex unsteady, free-surface flow in a rotating Turgo impulse water turbine. A comparison of two different geometries was conducted. The SPH method due to its mesh-less nature is capable of capturing the flow features appearing in the turbine, without diffusion at the water/air in...

We present a brief introduction to Smoothed Particle Hydrodynamics SPH where we focus on an approach to treat the physical viscosity Additionally we describe in detail the basic principles of our parallel implementation of the SPH method In the second part we summarise some results of test simulations performed to achieve general features of the method and we end discussing some astrophysical a...

In this paper we present some test results of our newly developed Multi-Phase Chemo-Dynamical Smoothed Particle Hydrodynamics (MP-CD-SPH) code for galaxy evolution. At first, we present a test of the “pure” hydro SPH part of the code. Then we describe and test the multi-phase description of the gaseous components of the interstellar matter. In this second part we also compare our condensation a...

We describe a modified form of Smoothed Particle Hydrodynamics (SPH) in which the specific thermal energy equation is based on a compatibly differenced formalism, guaranteeing exact conservation of the total energy. We compare the errors and convergence rates of the standard and compatible SPH formalisms on analytic test problems involving shocks. We find that the new compatible formalism relia...