Author(s): Charley Lubinbert; Monzur Imteaz; Jamal Naser; Donald Phillips
Linked Author(s):
Keywords: Ogee weir; Computational fluid dynamics; Finite volume method; Screening device; Shear stress; Multiphase model
Abstract: In order to prevent most of the gross pollutants released from sewer overflows during heavy downpours from polluting downstream water bodies, a new wastewater screening device is under investigation which incorporates a rectangular tank and an ogee weir. The behaviour of this device was investigated using numerical model based on the finite volume approach. A three-dimensional (3D) numerical model of the structure was developed using computational fluid dynamics (CFD) software, ? AVL Fire?. Model was developed for actual flow conditions and actual physical dimensions of the device to be used in the laboratory. A multi-phase mixture (water and air) model was used for this purpose and was simulated for different flow volumes and inlet conditions. For the case considered in this paper, numerical model predicted reasonable free surface profile, velocity, volume fraction and shear stress distribution results which can be used to analyse the self cleaning behaviour and flow separation of proposed device and the numerical model results will be validated with similar laboratory experiments.
Year: 2010