A computational fluid dynamics (CFD) particle tracking approach to efficiency prediction

Abstract

Storage chambers play an important role in urban pollution management. They are frequently used in conjunction with CSO structures, where they reduce the number and magnitude of CSO spill events. However, one problem associated with the use of storage tanks at CSOs is the deposition of sediment. Techniques which enable engineers to design such chambers for minimal deposition are required. In this paper the use of the particle tracking routine contained within the Fluent computational fluid dynamics (CFD) software for the prediction of sediment deposition in storage chambers is described. The paper details the way in which the particle tracking routine was configured to produce realistic efficiency results for the comparison of storage chamber performance. Consideration was given to the physical characteristics of the sediment, the injection location, the boundary conditions and a number of relevant simulation parameters. The sensitivity of efficiency prediction to the selection of these parameters is emphasised. The paper also demonstrates the potential application of particle tracking to the prediction of probable deposit locations.