Evaluation of the Effects of the Longitudinal Baffle on Settling Efficiency within Rectangular-shaped Sedimentation Basin

장방형 침전지내 도류벽의 침전효율에 대한 영향 평가

  • 박노석 (한국수자원공사 K-water 연구원) ;
  • 김성수 (한국수자원공사 K-water 연구원) ;
  • 서인석 (한국수자원공사 K-water 연구원) ;
  • 민경은 (한국수자원공사 K-water 연구원)
  • Received : 2009.06.12
  • Accepted : 2009.10.05
  • Published : 2009.10.15

Abstract

In the case that the average velocity within rectangular-shaped sedimentation basin is less than 1.5cm/sec, and Froude number less than $10^{-6}$, it can not be expected that the longitudinal baffle improves the sedimentation efficiency. Also, since relatively lower velocity increases the effect of geostrophic body force, asymmetric flow pattern on a plane occurs within the basin. From the results of CFD (Computational Fluid Dynamics) simulation, in the case that the highest velocity within rectangular-shaped sedimentation basin is over 1.5cm/sec, and Froude number over $10^{-6}$, it can be expected that the longitudinal baffle installed within rectangular-shaped sedimentation basin improves the sedimentation efficiency.

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