title: Removing Grit During Wastewater Treatment: CFD Analysis of HDVS Performance.
abstract: Computational Fluid Dynamics (CFD) was used to simulate the grit and sand separation effectiveness of a typical hydrodynamic vortex separator (HDVS) system. The analysis examined the influences on the separator efficiency of: flow rate, fluid viscosities, total suspended solids (TSS), and particle size and distribution. It was found that separator efficiency for a wide range of these independent variables could be consolidated into a few curves based on the particle fall velocity to separator inflow velocity ratio, Ws/Vin. Based on CFD analysis it was also determined that systems of different sizes with length scale ratios ranging from 1 to 10 performed similarly when Ws/Vin and TSS were held constant. The CFD results have also been compared to a limited range of experimental data.
authors.affiliation: Civil and Environmental Engineering Department, Colorado State University, Fort Collins, CO 80523, USA.
authors.forename: Robert N
authors.initials: RN
authors.lastname: Meroney
authors.forename: Robert E
authors.initials: RE
authors.lastname: Sheker
mesh_terms: D057446:Hydrodynamics; D010316:Particle Size; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D062065:Wastewater; D014874:Water Pollutants, Chemical