Numerical modeling of solid particles motion in suspensions using Smoothed Particle Hydrodynamics

Abstract

AbstractSuspensions and their applications can be found in many fields of mechanical, civil and environmental engineering. To consider the flow behavior as well as fluid‐solid interactions in dilute suspensions, we present 3D Direct Numerical Simulations (DNS) of a single‐phase fluid with discrete solid particles. We therefore developed a numerical implementation based on the general‐purpose particle simulation toolkit HOOMD‐blue [1, 3] extended for the usage of Smoothed Particle Hydrodynamics (SPH) [2, 5]. Since both the fluid and the solid part can be discretized by particles, SPH as a Lagrangian particle method presents a good choice to model this particular non‐linear problem. To describe solid contact and interaction forces, we consider two solid contact models. The first model is a simplified Hertz‐Mindlin contact model [4] as used in classical DEM simulations. The second model is a lubrication force model as presented by [6]. To review the results of the approach, we discuss an example with two non‐spherical solid grains in a single‐phase fluid under shear flow.