A coupled SPH-DEM model for fluid-structure interaction problems with free-surface flow and structural failure

Abstract

An integrated particle model is developed to study fluid-structure interaction (FSI)

An integrated particle model for fluid–particle–structure interaction problems with free-surface flow and structural failure

“…Validation tests for fluidstructure interaction have been carried out in our previous work (e.g. fluid-structure interaction) [23] and validation tests for fluid-particle interaction are validated (e.g. fluid-particle interaction and particle-particle interaction) in the current study.…”

“…As SPH and DEM are both meshfree particle methods under the Lagrangian scheme, the identification of free surfaces, moving interfaces and deformable boundaries can be handled straightforwardly [19]. Coupled SPH-DEM modelshave been developed and applied to multiphase flow problems with FPI in [20][21][22] and FSI problems in [23]. Other similarly coupled particle models in the Lagrangian framework such as SPH-SPH [24] and MPS-MPS [25] have also been applied in either FSI or FPI problems, but the kernel functions used in SPH or MPS for particles and structures lack physical representations of particle-particle contact and structural failure.…”

“…In this study, an improved integrated particle model coupling SPH and DEM with a local averaging technique is proposed for the fluid-particle-structure interaction problems. In our previous study [23], the integrated model only dealt with fluid-structure interaction with the failure of the structure. As a further model improvement, the solid particle has been integrated into the current model to consider more complex engineering problems with fluid-particle-structure interaction.…”

A Discrete Approach to Meshless Lagrangian Solid Modeling

“…Rather than use LJ, this effort approaches this problem by applying a force on the particles in contact proportional to what is needed to stop the particle from crossing the boundary and stop it from further travel. A variation of this approach was previously taken with SPH and discrete multi-hybrid physics (DMP) models to study the effects of blood and tissues in the human body [33][34][35][36][37][38][39]. By using the combination of these approaches, a stable Lagrangian simulation of solid mechanics and fluid-solid interactions can be achieved.…”

“…Efforts to use artificial viscosity approaches have only had limited success [23,26]. If these limitations could be overcome, SPH and SPAM could be used together for fluid-solid interaction (FSI) simulations [33][34][35][36][37][38][39], a capability that many commercial FEA and CFD software packages lack.…”