Modeling of long-term shock interaction with a movable particle curtain in a rectangular tube based on a dense discrete phase model

Zhang, Lite; Feng, Zilong; Sun, Mengyu; Guan, Hao; Jin, Haozhe; Shi, Hongyan

doi:10.1016/j.powtec.2022.118116

Cited by 2 publications

(1 citation statement)

References 30 publications

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“…Zhang et al [15] used the VOF-DPM method to study the wake structure and particle entrainment behavior of bubbles in a solid-liquid system-the particles occupied a relatively small percentage of the simulated system and the particle-particle interaction was negligible. The DDPM [16,17] takes into account collision between particles, and the resulting forces are calculated from the stress tensor of the particles at the kinetic theory of granular flow (KTGF)-this model simplifies the calculation and does not calculate the real collision process.…”

Section: Introductionmentioning

confidence: 99%

Influence of Impeller and Mixing Tank Shapes on the Solid–Liquid Mixing Characteristics of Vanadium-Bearing Shale Based on the DEM-VOF Method

Zhang

Xue

et al. 2023

Processes

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The mixing tank is important equipment for industrial applications in the wet vanadium extraction process, but in practice, there are problems, such as uneven mixing of minerals. In this study, the effect of different types of impellers and different mixing tank structures on the suspended mass of particles was simulated using the discrete element method and volume of fluid method (DEM-VOF). The simulation results show that the round-bottomed tank performed mixing better than the flat-bottomed tank at different particle densities, and the flat-bottomed tank was prone to particle stratification and other phenomena. The round-bottomed mixing tank could better improve the solid–liquid suspension effect. In this study, the coefficient of variation σ was introduced to characterize the suspended mass of particles. By monitoring the σ value, it was found that the blade pitch angle 45 (BPA45) had the best mixing uniformity in the inclined pitched blade turbine (PBT). As the PBT impeller pitch angle increased, the particle suspension increased. When comparing different types of impellers, the Rushton exhibited a 45% improvement in mixing uniformity relative to the BPA45. Second, the width and height of the trough bottom projection were optimized and their σ values were calculated separately for different parameter conditions. The width of 0.05 m and height T/4 (T being the diameter of the tank) were finally determined to be the optimum parameters for the optimal design of the vanadium shale leaching mixing trough.

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Section: Introductionmentioning

confidence: 99%