Numerical simulation of a combined oxidation ditch flow using 3D k-ε turbulence model

Article type: Research Article

Authors: LUO, Lin | LI, Wei-min | DENG, Yong-sen | WANG, Tao

Affiliations: State Key Laboratory of Hydraulics, Sichuan University, Chengdu 610065, China | College of Municipal Construction and Environmental Engineering, Chongqing University, Chongqing 400045, China

Note: [] Corresponding author. E-mail: luolin@tsinghua.org.cn

Abstract: The standard three dimensional (3D) k-ε turbulence model was applied to simulate the flow field of a small scale combined oxidation ditch. The moving mesh approach was used to model the rotor of the ditch. Comparison of the computed and the measured data is acceptable. A vertical reverse flow zone in the ditch was found, and it played a very important role in the ditch flow behavior. The flow pattern in the ditch is discussed in detail, and approaches are suggested to improve the hydrodynamic performance in the ditch.

Keywords: oxidation ditch, 3D simulation, turbulence flow

Journal: Journal of Environmental Sciences, vol. 17, no. 5, pp. 808-812, 2005