DDPM simulation of the erosion of immersed tubes in a pulsating fluidized bed

Xu, Liuyun; Wu, Feng; Wang, Junwu

doi:10.1016/j.ces.2023.118475

Cited by 4 publications

(3 citation statements)

References 51 publications

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“…The predicted value of PBA60 fluctuated In the actual production process, we also need to take into account the influence of power; it is important to reduce production costs and power consumption while ensuring adequate suspension of solid particles. The calculation of the mixing power in this simulation is given by 𝑃 = 2𝜋 × 𝑀 × 𝑁 60 (17) where P is the stirring power (W), M is the stirring torque (N-m), and N is the rotational speed (rpm). Using this formula, the stirring torque under various conditions can be calculated by simulation for calculating the stirring power.…”

Section: Influence Of Impeller On Particle Suspension Effectmentioning

confidence: 99%

“…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%

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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: Influence Of Impeller On Particle Suspension Effectmentioning

confidence: 99%

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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show abstract

“…Zhou et al (2022) established a precise pressure drop model and obtained the pressure drop distribution law in the bend. Xu et al (2023) believes that when particles flow through the elbow, the fluid traction and inertia forces will produce a shift in the direction of velocity, forming a V-shaped wear shape.…”

Section: Introductionmentioning

confidence: 99%

Research on the Wear Characteristics of Horizontal to Vertical Bends of Dilute-Phase Pneumatic Conveying Based on CFD-Dem Method

Zheng

2024

Int. J. Eng. Tech. Mgmt. Res.

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To solve the problem that thin phase pneumatic conveying elbow is easy to wear, the particle mass flow rate, gas velocity, bending diameter ratio and particle size are selected as the influencing factors. The orthogonal test of four factors and four levels is carried out by using CFD-DEM coupled numerical simulation. The results of bending pipe wear, particle velocity and system pressure drop under different conditions are obtained. The results show that the particle mass flow and gas velocity have significant effects on the above three evaluation indexes, while the bending diameter ratio and particle size have no significant effects on the particle velocity and bending wear. Under the discussed conditions, the factors corresponding to the minimum wear are: mass flow rate of 0.5kg/s, gas velocity of 30 m/s, bending diameter ratio of 4.5D, particle size of 2.5mm.

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DDPM Simulation for Fluidization Behavior and Reduction of Iron Ore Fines with Hydrogen in the Fluidized Bed

Zhou,

Su,

Yang

et al. 2024

Metall Mater Trans B

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DDPM simulation of the erosion of immersed tubes in a pulsating fluidized bed

Cited by 4 publications

References 51 publications

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

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

Research on the Wear Characteristics of Horizontal to Vertical Bends of Dilute-Phase Pneumatic Conveying Based on CFD-Dem Method

DDPM Simulation for Fluidization Behavior and Reduction of Iron Ore Fines with Hydrogen in the Fluidized Bed

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