The 7th National Conference on Computational Mechanics of Granular Materials in conjunction with The 4th International Symposium on Computational Particle Technology (CMGM-2024 & CPT-2024)

The blocking behavior of adhesive materials is a common issue in the bulk material transferring process. In order to improve the flowability of adhesive materials in bulk materials handling and effectively alleviate blocking problems, the discrete element method(DEM) is adopted to simulate the dynamic behavior of adhesive materials within the transferring system. From the perspective of microscopic interaction forces of granular materials, the adhesion mechanism of bulk materials is revealed. Using particle motion velocity and material residue as evaluation indicators, the structure and vibration process of the transferring system are optimized and parameter-matched. The results show that the adhesive force is greater along the equipment wall direction, and vibration can disrupt bonding bonds, improving the flowability of adhesive materials. Structural optimization shows that compared to the "Linear" chute, the particle motion velocity is lower in the "Curved " chute, but there is less material residue. Besides, compared to the deflector hood, the impact plate has a longer ejection distance, faster material flow velocity, and less residue. Based on the concept of vibration intensity, empirical models for material flow velocity and material residue are created, and the concept of critical vibration intensity is proposed. The values of critical vibration intensity for different structural transferring systems are obtained, which can be used to guide the selection of vibration process parameters in industries.

Transferring system,Blocking behavior,Discrete element method,Adhesion mechanism,Process optimization