Dust Suppression Analysis of a New Spiral Hopper Using CFD-DEM Simulations and Experiments
Abstract
:1. Introduction
2. CFD-DEM Numerical Simulation
2.1. CFD-DEM Governing Equations
2.2. Fluid–Particle Interaction Forces
2.3. Simulation Conditions
3. Experiment
4. Results and Discussion
4.1. Profile of Particle Motion
4.2. Distribution of Flow Field
4.3. Performance of Dust Suppression
5. Conclusions
- The particle velocity is obviously reduced through the spiral hopper, and the collision between the particle and hopper is weakened. A semi-closed space is formed by the spiral guide plate so that the dusty airflow forms an eddy in the spiral hopper. The axial velocity of the spiral hopper inside is obviously reduced. The flow field of the spiral hopper is effectively improved.
- Compared with the dust concentration of the spiral hopper inlet and the conventional hopper inlet, the maximum dust concentration of spiral hopper inlet is reduced by 56.9%. The secondary fugitive dust is controlled due to the induced airflow is blocked by a spiral guide plate.
Author Contributions
Funding
Conflicts of Interest
References
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Description | Model |
---|---|
Solver | Pressure-based |
Viscous model | Realizable k-ε |
Inlet | Pressure inlet |
Outlet | Pressure outlet |
Wall | No slip |
Parameters | Value |
---|---|
Diameter of cylinder (m) | 0.5 |
Height of cylinder (m) | 0.44 |
Total height of hopper (m) | 0.66 |
Bottom diameter (m) | 0.16 |
Pitch of spiral guide plate (m) | 0.72 |
Parameters | Values | Parameters | Values |
---|---|---|---|
Sand Poisson ratio | 0.5 | Geometric shear modulus (Pa) | 3.0 × 109 |
Sand shear modulus (Pa) | 1.0 × 107 | Sand–sand restitution coefficient | 0.48 |
Sand density (kg/m3) | 2650 | Sand–sand static friction coefficient | 0.57 |
Sand size (mm) | 1.6 | Sand–sand rolling friction coefficient | 0.07 |
Number of sands | 176,000 | Sand–geometry restitution coefficient | 0.45 |
Geometric Poisson ratio | 0.3 | Sand–geometry static friction coefficient | 0.58 |
Geometric density (kg/m3) | 1200 | Time step (s) | 1.0 × 10−5 |
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Yuan, J.; Jin, C.; Ye, F.; Hu, Z.; Chen, H. Dust Suppression Analysis of a New Spiral Hopper Using CFD-DEM Simulations and Experiments. Processes 2020, 8, 783. https://doi.org/10.3390/pr8070783
Yuan J, Jin C, Ye F, Hu Z, Chen H. Dust Suppression Analysis of a New Spiral Hopper Using CFD-DEM Simulations and Experiments. Processes. 2020; 8(7):783. https://doi.org/10.3390/pr8070783
Chicago/Turabian StyleYuan, Jianming, Chenglong Jin, Fangping Ye, Zhihui Hu, and Huozhi Chen. 2020. "Dust Suppression Analysis of a New Spiral Hopper Using CFD-DEM Simulations and Experiments" Processes 8, no. 7: 783. https://doi.org/10.3390/pr8070783