title: Computational modelling of large aerated lagoon hydraulics.
abstract: A good understanding of the hydraulic performance of aerated lagoons is required for their design and operation. A comprehensive numerical procedure has been developed for the three-dimensional computational modelling of the flow in large lagoons including high-speed floating mechanical surface aerators. This paper describes the procedure that consists of separate aerator modelling, then applying the obtained results as boundary data for a full lagoon model. A model application to an industrial aerated lagoon serves as an example of flow analysis. Post processing of the results by calculating the local average residence time (age of fluid) provides a powerful and intuitive technique to visualize and analyse the lagoon performance. The model has been verified by comparing the local average residence time predictions with measurements from a dye study. It is shown that the numerical modelling proposed is feasible and constitutes an effective new tool in improving the performance and design of industrial lagoons.
authors.affiliation: Department of Mechanical Engineering, University of British Columbia, Vancouver, BC, Canada.
authors.forename: Konstantin
authors.initials: K
authors.lastname: Pougatch
authors.forename: Martha
authors.initials: M
authors.lastname: Salcudean
authors.forename: Ian
authors.initials: I
authors.lastname: Gartshore
authors.forename: Philip
authors.initials: P
authors.lastname: Pagoria
mesh_terms: D000332:Aerobiosis; D007700:Kinetics; D008433:Mathematics; D008962:Models, Theoretical; D010209:Paper; D013499:Surface Properties; D014865:Waste Disposal, Fluid; D014867:Water
chemical_list: D014867:Water