Volume 71
您当前的位置:首页 > 期刊文章 > 过刊浏览 > Volumes 60-71 (2022) > Volume 71
Qiao, T., Liu, L., & Ji, S. (2022). Superquadric DEM-SPH coupling method for interaction between non-spherical granular materials and fluids. Particuology, 71, 20-33. https://doi.org/10.1016/j.partic.2022.01.012
Superquadric DEM-SPH coupling method for interaction between non-spherical granular materials and fluids
Ting Qiao, Lu Liu *, Shunying Ji *
State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, Dalian University of Technology, Dalian 116024, China
10.1016/j.partic.2022.01.012
Volume 71, December 2022, Pages 20-33
Received 23 June 2021, Revised 19 December 2021, Accepted 14 January 2022, Available online 31 January 2022, Version of Record 25 February 2022.
E-mail: jisy@dlut.edu.cn

Highlights

• A superquadric DEM-SPH coupling method is developed for particle–fluid interaction.

• A contact detection method is established for the superquadric element and the fluid particle.

• Collapse process of the partially submerged granular column is simulated and analyzed.

• Particle–fluid interactions of differently shaped particles are compared.


Abstract

The research on the coupling method of non-spherical granular materials and fluids aims to predict the particle–fluid interaction in this study. A coupling method based on superquadric elements is developed to describe the interaction between non-spherical solid particles and fluids. The discrete element method (DEM) and the smoothed particle hydrodynamics (SPH) are adopted to simulate granular materials and fluids. The repulsive force model is adopted to calculate the coupling force and then a contact detection method is established for the interaction between the superquadric element and the fluid particle. The contact detection method captures the shape of superquadric element and calculates the distance from the fluid particle to the surface of superquadric element. Simulation cases focusing on the coupling force model, energy transfer, and large-scale calculations have been implemented to verify the validity of the proposed coupling method. The coupling force model accurately represents the water entry process of a spherical solid particle, and reasonably reflects the difference of solid particles with different shapes. In the water entry process of multiple solid particles, the total energy of the water entry process of multiple solid particles tends to be stable. The collapse process of the partially submerged granular column is simulated and analyzed under different parameters. Therefore, this coupling method is suitable to simulate fluid–particle systems containing solid particles with multiple shapes.

Graphical abstract
Keywords
Superquadric function; Discrete element method; Smoothed particle hydrodynamics; Fluid–particle interaction; Coupling method