Simulation of the flow dynamics of a dry granular flow and force interaction with a rigid wall using the material point method
Year: 2021
Type: article
Abstract: This study investigates the flow dynamics of a dry granular flow and force interaction with a rigid wall using the material point method (MPM). The model equations and solution scheme of the MPM are presented, and the inscribed Drucker–Prager model is adopted in the constitutive model of the MPM. An analytical solution to the classical dam-break problem is used to validate that the MPM can accurately simulate the large deformation problem. Then, the simulation of a channel flow experiment of a dry granular flow impacting a rigid wall is conducted. In the simulations, a bottom friction algorithm is presented based on the MPM. The simulation results of the normal force and bending moment of the rigid wall are consistent with the experimental results, which validated the correctness and effectiveness of the simulations. The internal velocity distribution of the granular flow at a critical time, the motion path of the key points, the influence of the bottom friction angle on the total normal force of the rigid wall, and the velocity and kinetic energy of the granular flow are analysed and discussed. Through the analysis of the granular flow position, the velocity vector of the internal point, and the force vector of the rigid wall at several key moments in the process of the granular flow impacting the rigid wall, the mechanism of the granular flow impacting a rigid wall is summarized. It can provide a scientific reference and basis for the prevention and control of the granular flow disaster and the design of a retaining wall.
Source: Computational Particle Mechanics
Language: English
Subfield: Computational Mechanics
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,280
OpenAlex ID: W3209901574