Fine sediment retention in storage chambers: an assessment of time-dependent effects.
The optimisation of the design of a storage chamber is generally based upon some measure of the chamber's sedimentation efficiency. In the UK, chambers that minimise the deposition of fine sediments are preferred. Previous laboratory and CFD-based studies to measure efficiency have focused on steady flow conditions. However, both the flow hydraulics within a storage chamber and the pollutant loading in the incoming sewage vary markedly during storm events. This paper outlines a CFD-based approach for determining "overall" chamber efficiency. The approach employs an unsteady volume-of-fluid multiphase model and stochastic particle tracking. Preliminary results from a simplified two-dimensional model are presented.
Stovin
V R
VR
Department of Civil and Structural Engineering, University of Sheffield, UK. v.stovin@sheffield.ac.uk
Grimm
J P
JP
Saul
A J
AJ
D004784:Environmental Monitoring / Q000379:methods*; D019015:Geologic Sediments; D008962:Models, Theoretical; D011891:Rain; D012722:Sewage; D013997:Time Factors; D014865:Waste Disposal, Fluid; D014872:Water Movements
D012722:Sewage