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Optimization of a hydrodynamic separator using a multiscale computational fluid dynamics approach
Vivien Schmitt1, Matthieu Dufresne, Jose Vazquez
1National School for Water and Environmental Engineering of Strasbourg (ENGEES), ICube (University of Strasbourg, CNRS, INSA of Strasbourg, ENGEES), Mechanics Department, Fluid Mechanics Team, ENGEES 1 quai Koch BP 61039 67070 Strasbourg cedex, France.
Abstract:
This article deals with the optimization of a hydrodynamic separator working on the tangential separation mechanism along a screen. The aim of this study is to optimize the shape of the device to avoid clogging. A multiscale approach is used. This methodology combines measurements and computational fluid dynamics (CFD). A local model enables us to observe the different phenomena occurring at the orifice scale, which shows the potential of expanded metal screens. A global model is used to simulate the flow within the device using a conceptual model of the screen (porous wall). After validation against the experimental measurements, the global model was used to investigate the influence of deflectors and disk plates in the structure.
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