earticle

영어

For urban stormwater pollution control was evaluated to define solid particle removal capacities. A hydrodynamic filter stormwater separator (HDFS) that is one of the best management practices (BMPs) this device is using centrifugal motion and filtration which separates solids pollution from runoff. In this study, the velocity flow field and particle tracking of hydrodynamic separator were investigated using anthracite as the computational fluid dynamics (CFD) model particle. Fluent 6.3.26 CFD program was used to predict the solid particles removal efficiency for various parameters such as particle sizes, surface loading rates, and the ratio of underflow to overflow. The velocity flow field in a HDFS had been simulated using CFD RNG κ-ε model. Modeling results for the removal efficiency of HDFS were similar with the results obtained from experimental measurements from laboratory scale HDFS. These results showed that the simulated velocity field was useful to interpret the behavior of flow in the hydrodynamic separator. The results obtained from particle tracking can be applied to predict the separation efficiency.

한국어

미세입자 제거기술은 도시지역 비점오염 제어에서 가장 중요한 수단이다. 수리동역학적 강우유출수여과장치(HDFS)는 원심력과 여과에 의해 미세입자를 제거하는 최적관리방안중의 하나이다. 본 연구에서는 전산유체역학(CFD)기법을 이용하여 HDFS 장치내 입자추적과 유속장 분포를 분석하였다. Fluent 6.3.26 CFD 입자추적기법을 적용하여 수면적부하율 변화와 하부배출유량비의 변화에 대한 SS 처리효율을 예측하였다. RNG κ-ε모델을 적용한 예측값과 실험에 의한 실측값은 유사하게 나타났다. HDFS의
설계 시 여러 가지 실제 모형을 제작하여 유속분포 특성을 파악하는 것에 비교하여 CFD기술 활용은 시간과 비용 저감효과가 있을 것으로 판단된다.