Simulation of Various Baffle Types in a Constructed Wetland Sedimentation Tank using CFD

• 영문명: Simulation of Various Baffle Types in a Constructed Wetland Sedimentation Tank using CFD
• 발행기관: 한국습지학회
• 저자명: Taegyun Noh Jechan Jeon Lee-Hyung Kim
• 간행물 정보: 『한국습지학회지』제18권 제3호, 324~329쪽, 전체 6쪽
• 주제분류: 자연과학 > 지질학
• 파일형태: PDF
• 발행일자: 2016.08.01

영문 초록

Constructed wetlands are widely applied in urban and rural areas for various purposes such as pollutants reduction, acquisition of eco-spaces and habitats, flooding reduction, acquisition of water resources and environmental education. Since the design of constructed wetlands utilizes ecosystems, special consideration must be given to ecological mechanisms, environmental mechanisms and hydrological mechanisms. To ensure the sustainable functionality of constructed wetlands, it is necessary to achieve stable flow rate and velocity, and remove sediments to ensure sufficient space for detention. To enhance the efficiency of constructed wetland sedimentation basins, this study determined the optimal position for baffle installation, and applied Computational Fluid Dynamics (CFD) to the cross-sectional design of wetlands. CFD analysis revealed that the decrease in flow velocity with baffle installation enhanced the efficiency of sedimentation of particulate matters. Vertical baffles had higher sedimentation efficiency than those with an inclined angle. When vertical baffles were installed in the sedimentation basin of a hybrid constructed wetland to reduce non-point source pollutants in urban areas, the average flow velocity within the basin decreased by 10~30%, while the sedimentation efficiency improved by 1.3~1.5 times. The application of CFD to constructed wetlands is expected to improve the cost efficiency of designing hybrid constructed wetlands with high removal efficiency.

목차

1. Introduction

2. Materials and method

3. Results and Discussion

4. Conclusion

References

키워드

Baffle Computational Fluid Dynamics Constructed wetlands Particles Sedimentation