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Numerical Fluid Dynamic Study for Improvement of Mixing Efficiency in the Contactor  

Shin, Mi-Soo (Department of Environmental Engineering, Chungnam National University)
Kim, Hey-Suk (Department of Environmental Engineering, Chungnam National University)
Joh, Jing-Young (Department of Environmental Engineering, Chungnam National University)
Choi, Jun-Ho (Department of Environmental Engineering, Chungnam National University)
Jang, Dong-Soon (Department of Environmental Engineering, Chungnam National University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.28, no.8, 2006 , pp. 860-865 More about this Journal
Abstract
The characteristics of flow field and turbulent mixing efficiency of SS in non-aerated contacting reactor are critical design parameters directly affecting on the efficiency of the overall process of wastewater treatment system. To this end, in this study numerical fluid dynamic calculation has been made to investigate the flow field and concentration distribution of SS in terms of specification(shape and dimension) of impeller and other operating conditions. As the first step, the performance of the computer program developed was successfully evaluated by the comparison of the typical flow field with the type of impeller with that appeared in open literature. Further, a series of parametric investigations are made in terms of interesting parameters such as the type and dimension of impeller, location, and number of impeller, etc. A number of useful conclusions obtained by numerical calculation are the superiority of mixing efficiency of pitched type than the flat one together with the visible increase of the overall mixing effect by the employment of the larger impeller and increase of the impeller number, etc.
Keywords
Contactor; Impeller Type; Mixing Efficiency; Numerical Simulation;
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