Flow characteristics are one of the main factors affecting the flocculation process. The flow field in the flocculation tank was numerically modeled using the κ-ε turbulent flow model by considering different hydraulic conditions such as the flow rate, paddle rotating speed, dimension and its installation positions. The numerical modeling and experiment observation indicates that the turbulent momentum κ and effective energy consumption ε can be used as an indicator of flocculation efficiency. The rectangular shaped flocculation tank can dampen the flow effectively, but in the four corners there is a lack of mixing, which can be solved by installing baffles to promote the flocs growth. A proper paddle rotating speed can increase the collisions between particles in the main flocculation area; while still keep the formatted flocs from being damaged by shear force. Increasing the paddle service range appropriately can enlarge the main flocculation area. The paddle installation height should consider the turbulent conditions in both the upper and lower part of the flocculation tank. A set of parameters was recommended for the mechanical flocculation tank design.
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ASME-JSME-KSME 2011 Joint Fluids Engineering Conference
July 24–29, 2011
Hamamatsu, Japan
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-4440-3
PROCEEDINGS PAPER
Numerical Modeling and Experimental Study of the Mechanical Flocculation Process
Bipeng Yan,
Bipeng Yan
YangZhou University, Yangzhou, Jiangsu, China
Search for other works by this author on:
Feng Shen
Feng Shen
YangZhou University, Yangzhou, Jiangsu, China
Search for other works by this author on:
Bipeng Yan
YangZhou University, Yangzhou, Jiangsu, China
Feng Shen
YangZhou University, Yangzhou, Jiangsu, China
Paper No:
AJK2011-03021, pp. 1285-1294; 10 pages
Published Online:
May 25, 2012
Citation
Yan, B, & Shen, F. "Numerical Modeling and Experimental Study of the Mechanical Flocculation Process." Proceedings of the ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D. Hamamatsu, Japan. July 24–29, 2011. pp. 1285-1294. ASME. https://doi.org/10.1115/AJK2011-03021
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