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Examining Three-Dimensional Flow Characteristics in the Distribution Channel to the Flocculation Basin using CFD  

Park, No-Suk (한국수자원공사)
Beak, Heung-Ki (한국수자원공사)
Kim, Jeong-Hyun (한국수자원공사)
Min, Jin-Hui (한국수자원공사)
Shin, Hang-Sik (한국과학기술원 건설 및 환경공학과)
Publication Information
Journal of Korean Society of Water and Wastewater / v.18, no.4, 2004 , pp. 500-507 More about this Journal
Abstract
This study was conducted to evaluate the equity of the flow distribution from rapid mixing basin to the flocculation basins. Also, several types of inlet structures of the open channel affecting the flow pattern and distribution trend were studied using Computational Fluid Dynamics (CFD) simulation. For investigating the factual phenomena in distribution channel, we selected a certain domestic water treatment plant with capacity of $361,000m^3/d$. From the measurements of flow discharge, it is investigated that this existing inlet geometry resulted in significant inequitable distribution. The both largest deviations in the basins and rows were over 10%. In order to reduce the these deviation, this study suggested installing a baffle against the influent, and showed the effectiveness which the largest deviation was less than 3%. Also, it was concluded that the existing design method of open channel could be improved by three-dimensional hydrodynamic analysis for optimizing the even flow.
Keywords
Equitable distribution; distribution channel; CFD simulation; standard deviation;
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