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The Effect of Dead Zone on Hydraulic Efficiency in Clearwell  

Lee, Seungjae (한국과학기술원 건설 및 환경공학과)
Shin, Eunher (한국과학기술원 건설 및 환경공학과)
Kim, Sunghoon (한국과학기술원 건설 및 환경공학과)
Park, Heekyung (한국과학기술원 건설 및 환경공학과)
Publication Information
Journal of Korean Society of Water and Wastewater / v.21, no.2, 2007 , pp. 177-185 More about this Journal
Abstract
Hydraulic efficiency($T_{10}/T$) in clearwell is often estimated by L/W ratio. However, this estimation is not accurate because other factors which give an effect on hydraulic efficiency such as shape of basin, diffuser wall and intra-basin is ignored. Therefore, in this research, hydraulic efficiency is predicted by the quantitative analysis of dead zone using CFD simulation in a pilot scale clearwell. The results show that the reason why higher L/W ratio increase the hydraulic efficiency is to decrease the dead zone of linear region which is located between baffles. Diffuser wall or intra-basin also affects on hydraulic efficiency with this process. Also, we conclude that hydraulic efficiency can not be reached to 0.8 or higher.
Keywords
Hydraulic efficiency; L/W ratio; Diffuser wall; Intra-basin; Dead zone; CFD(Computational Fluid Dynamics); SF(Shape Factor);
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Times Cited By KSCI : 1  (Citation Analysis)
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