title: Numerical simulation of a combined oxidation ditch flow using 3D k-epsilon turbulence model.
abstract: The standard three dimensional(3D) k-epsilon 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.
authors.affiliation: State Key Laboratory of Hydraulics, Sichuan University, Chengdu 610065, China. luolin@tsinghua.org.cn
authors.forename: Lin
authors.initials: L
authors.lastname: Luo
authors.forename: Wei-min
authors.initials: WM
authors.lastname: Li
authors.forename: Yong-sen
authors.initials: YS
authors.lastname: Deng
authors.forename: Tao
authors.initials: T
authors.lastname: Wang
mesh_terms: D003198:Computer Simulation; D017078:Laser-Doppler Flowmetry; D008962:Models, Theoretical; D010084:Oxidation-Reduction; D014865:Waste Disposal, Fluid / Q000295:instrumentation / Q000379:methods*; D014872:Water Movements; D018508:Water Purification / Q000295:instrumentation / Q000379:methods*