The mini-hydrocyclone is being proposed as a micro-separator in complex micro-devices for in-line fine particle separation as it has a concise geometry and no moving parts,. In this work, we present a numerical study combined by experiments on a 5 mm minihydrocyclone to investigate the transitional flow and particle separation with the presence of a fishhook effect. The results showed that the simulation from the LES model gave good agreement with that from DNS at an inlet velocity of 0.4 m/s. The LES model was then used to study the higher inlet velocity cases of 1.0 and 1.8 m/s. The particle separation was predicted by a Lagrangian model with an added user defined function (UDF) in the Fluent code to account for the particle interaction. The modeling results for the three inlet velocities studied showed that small particle Reynolds number, ReP, resulted in a poorly developed wake behind the large particles, which did not entrain fine particles leading to a barely noticeable fishhook effect for the 0.4 m/s inlet velocity. In contrast, a large ReP gives rise to larger wakes, which are capable of entraining fine particles more efficiently causing the pronounced fishhook effect at higher inlet velocities. The results show the particle separation with the fishhook effect could be modeled based on the particle entrainment model, whereas the accurate simulation of the fishhook effect in future should include a correction coefficient that varies with Rep to improve the separation efficiency predictions.
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ASME 2012 Fluids Engineering Division Summer Meeting collocated with the ASME 2012 Heat Transfer Summer Conference and the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels
July 8–12, 2012
Rio Grande, Puerto Rico, USA
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-4476-2
PROCEEDINGS PAPER
Study of the Transitional Flow and Particle Separation With a Fishhook Effect in a Mini-Hydrocyclone Available to Purchase
Guofeng Zhu,
Guofeng Zhu
University of New South Wales Canberra at ADFA, Canberra, ACT, Australia
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Jong-Leng Liow,
Jong-Leng Liow
University of New South Wales Canberra at ADFA, Canberra, ACT, Australia
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Andrew Neely
Andrew Neely
University of New South Wales Canberra at ADFA, Canberra, ACT, Australia
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Guofeng Zhu
University of New South Wales Canberra at ADFA, Canberra, ACT, Australia
Jong-Leng Liow
University of New South Wales Canberra at ADFA, Canberra, ACT, Australia
Andrew Neely
University of New South Wales Canberra at ADFA, Canberra, ACT, Australia
Paper No:
FEDSM2012-72095, pp. 289-298; 10 pages
Published Online:
July 24, 2013
Citation
Zhu, G, Liow, J, & Neely, A. "Study of the Transitional Flow and Particle Separation With a Fishhook Effect in a Mini-Hydrocyclone." Proceedings of the ASME 2012 Fluids Engineering Division Summer Meeting collocated with the ASME 2012 Heat Transfer Summer Conference and the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels. Volume 2: Fora. Rio Grande, Puerto Rico, USA. July 8–12, 2012. pp. 289-298. ASME. https://doi.org/10.1115/FEDSM2012-72095
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