Numerical Simulation of Sphere Impacting Water by SPH with Hydrodynamics

Abstract

The impact on water of aeronautical structures is likely to turn into a tragic event. In view of this, it is essential to develop new solutions to design worthy structure that can assure best behavior. The Smoothed Particles Hydrodynamics (SPH) is a mesh-free interpolation method which is a recent numerical analysis technique. One example of water impact based on SPH is presented here, which aims at an accurate numerical simulation of Fluid-Structure Interaction(FSI) in free surface flow context. The example describes a rigid sphere impacting onto water, presenting the global impact behavior as well as comparing the impact coefficient with analytical and experimental results. The SPH method is proved to be a reliable and efficient numerical tool.

Numerical research on rock breaking performance of water jet based on SPH

“…The MAT-NULL has no shear stiffness and the GRUNEISEN equation of state (EOS) for pressure response can be used to describe the behavior of water [21]. Its density was 1000kg/m3, the dynamic viscosity was 0.001Pa•s, and the Poisson ratio was 0.5.…”

Rock Breaking by Conical Pick Assisted with High Pressure Water Jet

“…Because of its mesh-free features, the SPH can be applied to solve discontinuous problems through continuum mechanics. It was successful to demonstrate that the SPH was applicable for simulation of the fluid impact [21].…”

“…In LS-DYNA code, the MAT-NULL which has no shear stiffness and the GRUNEISEN equation of state (EOS) for pressure response can be used to describe the behavior of water [21]; its density was 1000 kg/m 3 , the dynamic viscosity was 0.001 Pa·s, and the Poisson ratio was 0.5. And the EOS_GRUNEISEN is given by (10) to describe its pressure and volumetric strain relation:…”