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CFD Study on the Effect of Hydrocyclone Structure on the Separation Efficiency of Fine Particles.
- Source :
-
Separation Science & Technology . Nov2008, Vol. 43 Issue 15, p3777-3797. 21p. 6 Diagrams, 4 Charts, 5 Graphs. - Publication Year :
- 2008
-
Abstract
- Effects of geometric structure parameters of 10 mm-diameter hydrocyclones on the particle separation efficiency are studied using computational fluid dynamics (CFD). The fluid velocity profiles and particle trajectories are simulated using RFLOW software with a standard isotropic k-ε turbulent model. The JIS standard CaCO3-17 particles are adopted as a particulate sample in simulations and experiments. Comparing the simulated results with experimental data, a maximum deviation about 20% in partition curves occurs for 5-10 µm particles. However, fairly good agreements for the cut-size predictions and the fish-hook phenomenon are obtained. The simulated cut-size d50 is only 2 µm larger than that measured in experiments, while the value of d100 can be accurately predicted. An increase in overflow diameter or a decrease in underflow diameter leads to a lower separation efficiency but a clearer separation sharpness due to lower fluid underflow rate. A short-and-wide rectangular inlet is more efficient for particle separation than a tall-and-narrow one. An inclined inlet conduit plays an inessential role on the efficiency improvement but gains a 2 µm reduction in d100. Comparing the simulated results, the hydrocyclone used in the experiments of this study exhibits a higher separation sharpness than the Rietema type and a higher efficiency than the Bradley type based on the same operation capacity and hydrocyclone size. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01496395
- Volume :
- 43
- Issue :
- 15
- Database :
- Academic Search Index
- Journal :
- Separation Science & Technology
- Publication Type :
- Academic Journal
- Accession number :
- 34870564
- Full Text :
- https://doi.org/10.1080/01496390802286637