Estudio y mejora del funcionamiento de un decantador industrial mediante el uso de modelos CFD con OpenFOAM
Settling Tanks (STs) are used in wastewater treatment to improve water quality by elimination of suspended solids via gravitational settling. Gravitational separation processes and the internal hydrodynamics of the STs are often poorly understood and their design is often based on empirical relation...
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| Formato: | tesis de maestría |
| Fecha de publicación: | 2017 |
| País: | España |
| Recursos: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglés |
| OAI Identifier: | oai:riunet.upv.es:10251/86100 |
| Acesso em linha: | https://riunet.upv.es/handle/10251/86100 |
| Access Level: | acceso abierto |
| Palavra-chave: | Wastewater Settling tank Sedimentation CFD OpenFOAM Sedimentación Decantador Aguas residuales Sedimentació Aigües residuals TECNOLOGIA DEL MEDIO AMBIENTE MATEMATICA APLICADA INGENIERIA HIDRAULICA Máster Universitario en Ingeniería Hidráulica y Medio Ambiente-Màster Universitari en Enginyeria Hidràulica i Medi Ambient |
| Resumo: | Settling Tanks (STs) are used in wastewater treatment to improve water quality by elimination of suspended solids via gravitational settling. Gravitational separation processes and the internal hydrodynamics of the STs are often poorly understood and their design is often based on empirical relationships and past experience. CFD (Computational Fluid Dynamics) allows for a thorough understanding of the inner workings of STs. In this project, CFD is used to study the operation of an industrial ST in the treatment of groundwater and surface water generated at construction sites to ensure that any subsequent discharge meets environmental standards. A CFD model is developed to study the hydrodynamics and sedimentation processes taking place in the tank. The aim is to gain a better understanding of these processes, identifying dead zones and short-circuiting, and observe the effect of internal baffle positioning to see how efficiency of the ST could be improved. Sedimentability of solids will also be studied. First, the single-phase flow field will be simulated and then, the multiphase Eulerian approach will be taken to model the dispersed phase using the 'drift flux' approximation with a k-¿ turbulence model. The model will be partially calibrated with experimental settling tests. The open source CFD software OpenFOAM® has been chosen because it is free and state of art. Proposals to improve tank performance and efficiency of the ST in the removal of suspended solids of the ST will be outlined. It is intended that the model be flexible and of use to the company in a variety of settings. |
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