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| 1 | Superquadric DEM-SPH coupling method for interaction between non-spherical granular materials and fluids显示文摘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. | Ting Qiao Lu Liu Shunying Ji | 2022 | Particuology2022，，12： | 1 |
| 2 | Editorial:Computational granular mechanics显示文摘Granular materials exist widely in nature,industry and engineering applications and perform complex mechanical behaviors.Theoretical analysis,numerical simulations and physical experiments were adopted to investigate the mechanical properties of granular systems and to solve the engineering problems.The discrete element method(DME)was proposed in 1970s and has been a practical approach to study the macro and mesoscopic behaviors of various granular materials.Although numerical methods have been successfully applied to the study of basic physical and mechanical properties of granular materials,there are still many challenges in computational granular mechanics,such as the construction of real particle morphology,flow characteristics of granular materials,multi-media and multiscale modelling and high-performance computational algorithms. | Shunying Ji | 2020 | Theoretical & Applied Mechanics Letters2020，10，2： | 0 |
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