Research on the Influence of Inlet Velocity on Micron Particles Aggregation during Membrane Filtration
Abstract
:1. Introduction
2. Materials and Methods
2.1. Geometric Model
2.2. Governing Equations and Parameters
2.2.1. Governing Equation
2.2.2. Parameters
2.3. Numerical Methods and Boundary Conditions
2.4. The Influence of the Grid on the Calculation Results
3. Results
3.1. Simulation Results and Analysis
3.1.1. Pressure Contour Analysis
3.1.2. Velocity Contour Analysis
3.1.3. Particle Concentration Contour Analysis
4. Conclusions
- (1)
- The porous media model can be used to simulate the flow across the semipermeable membrane, as long as accurate values for the coefficient of viscous resistance and the coefficient of inertial resistance are obtained, via experimental technology.
- (2)
- The particle concentration distribution was affected by different Reynolds numbers. When the Reynolds number is 19,000, the particle concentration near the surface of the porous media zone was higher, and the highest particle concentration reached 0.005 mg/um3. With an increasing Reynolds number, the particle concentration near the surface of the porous media zone, gradually decreased. When the Reynolds number increased to 31,000, the particle concentration near the surface of the porous media zone was about 0.001 mg/um3, which was due to the increased scour velocity near the surface. Particle deposition near the surface of the porous media zone was closely related to the Reynolds number. The larger the Reynolds number, the less particles were deposited on the surface of the porous media zone.
- (3)
- The motion of particles in a flow field is susceptible to gravity. When there is gravity, because the particle’s own gravity can generate a velocity along the direction of gravity, the particle is easy to deposit and not easy to diffuse. When there is no gravity, particles are more likely to follow the fluid motion and diffuse more freely.
- (4)
- Comparing the three working conditions, when the Reynolds number reached 31,000, the flow velocity near the porous media zone was larger, resulting in a larger transmembrane pressure difference, which can promote higher water productivity.
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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P/MPa | Q/(mL/min) | v/(m/s) |
---|---|---|
0.04 | 78.5 | 0.11 |
0.05 | 87.9 | 0.14 |
0.06 | 100.9 | 0.17 |
0.07 | 111.2 | 0.21 |
0.08 | 129.3 | 0.24 |
0.09 | 150.5 | 0.29 |
0.10 | 168.1 | 0.32 |
0.11 | 175.3 | 0.41 |
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Lin, P.; Wang, Q.; Xu, X.; Zhu, Z.; Ding, Q.; Cai, B. Research on the Influence of Inlet Velocity on Micron Particles Aggregation during Membrane Filtration. Appl. Sci. 2022, 12, 7869. https://doi.org/10.3390/app12157869
Lin P, Wang Q, Xu X, Zhu Z, Ding Q, Cai B. Research on the Influence of Inlet Velocity on Micron Particles Aggregation during Membrane Filtration. Applied Sciences. 2022; 12(15):7869. https://doi.org/10.3390/app12157869
Chicago/Turabian StyleLin, Peifeng, Qing Wang, Xiaojie Xu, Zuchao Zhu, Qiangmin Ding, and Biaohua Cai. 2022. "Research on the Influence of Inlet Velocity on Micron Particles Aggregation during Membrane Filtration" Applied Sciences 12, no. 15: 7869. https://doi.org/10.3390/app12157869
APA StyleLin, P., Wang, Q., Xu, X., Zhu, Z., Ding, Q., & Cai, B. (2022). Research on the Influence of Inlet Velocity on Micron Particles Aggregation during Membrane Filtration. Applied Sciences, 12(15), 7869. https://doi.org/10.3390/app12157869