Numerical Simulation of Dry Granular Flow Impacting a Rigid Wall Using the Discrete Element Method
Fengyuan Wu1, Yunyun Fan1, Li Liang1
1Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, Northeastern University, Shenyang, P. R. China.
Plos One
|August 12, 2016
Summary
This study introduces a clump model for simulating dry granular flow impacting a wall. Increasing particle size in granular composition leads to higher peak forces on retaining walls, aiding disaster research and protective structure design.
Area of Science:
- Granular Mechanics
- Computational Physics
Background:
- Accurate simulation of granular flow requires realistic particle representation.
- Spherical particle models may not fully capture complex granular behaviors.
Purpose of the Study:
- To develop and validate a clump model for dry granular flow simulations.
- To investigate the influence of particle sphericity and grain composition on granular flow dynamics and impact forces.
Main Methods:
- Utilized the Discrete Element Method (DEM) to create clump models.
- Performed numerical simulations of dry granular flow impacting a rigid wall in an inclined chute.
- Validated simulation results against experimental data for normal force.
Main Results:
- The clump model accurately predicted normal forces on a rigid wall, validating its effectiveness.
- Analysis revealed that increasing particle size in granular composition increases peak forces on retaining walls.
- The study analyzed total normal force, bending moment, and granular flow motion processes.
Conclusions:
- The developed clump model provides a more realistic representation of particles than spheres.
- Grain composition significantly affects impact forces, with larger particles inducing greater forces.
- Findings support disaster research and the design of protective structures for granular flows.
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