Análisis y Simulación del Comportamiento Hidráulico del Sistema de Descomposición Anaeróbica mediante Dinámica Computacional de Fluidos del Campus Salache de la Universidad Técnica de Cotopaxi, Cantón Latacunga, Provincia de Cotopaxi, Periodo 2022.
In the present research project, a general diagnosis of the system used by the Technical University of Cotopaxi to treat wastewater from the Salache campus was carried out, for this reason, the main objective was to simulate the hydraulic behavior through a computational fluid model (CFD) in the ana...
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| Eará dahkkit: | |
| Materiálatiipa: | bachelorThesis |
| Giella: | spa |
| Almmustuhtton: |
2022
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| Fáttát: | |
| Liŋkkat: | http://repositorio.utc.edu.ec/handle/27000/10205 |
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Lasit fáddágilkoriid | Čoahkkáigeassu: | In the present research project, a general diagnosis of the system used by the Technical University of Cotopaxi to treat wastewater from the Salache campus was carried out, for this reason, the main objective was to simulate the hydraulic behavior through a computational fluid model (CFD) in the anaerobic decomposition system of the campus. Regarding to the methodology applied to perform the analysis, it was necessary to apply computational fluid modeling methods where pre-processing, processing and post-processing techniques are applied (SALOME, OpenFoam and ParaView software). For which it was also necessary to obtain information on the variables that influence the modeling, such as the flow rate into the system (Q), of the values dissolved oxygen (DO) and chemical oxygen demand (COD) values. These last two values were obtained by laboratory analysis, and in the field the inflow was obtained using the volumetric method directly in a check box near the sanitation system, taking values every hour for eight hours in a day and three days in a week, thus obtaining values of instantaneous flow delivered and average flow. Subsequently, for the modeling and design of the meshes of each of the stages of the system, Salome software was used, for which the data and dimensioning obtained from the plans and the technical report were of vital importance for this process. Following this, for the computational simulation of the fluid in OpenFoam, default values were used, most of them based on Navier Stokes equations that give the main fundamentals on continuity and momentum. For the transport values we used solvers in OpenFoam with the RASS method which is used exclusively for turbulent flows. To visualize the results it was necessary to use a post-processing software, in this case ParaView, in which it was possible to observe the dynamics of the system in relation to the two variables chosen for the analysis. With respect to the velocity parameter (u) and taking into account the low inlet flow rate, the short circuits were more evident during the first minutes of filling stage 1, and later it was taking a less turbulent aspect and with less presence of vortices. Likewise, in relation to the water passage parameter (alphawater), the result was a slow filling time in stages 2 and 3, thus directly affecting the dissolved oxygen present in the wastewater and at the same time reducing the efficiency of the treatment. It was concluded that the system design was oversized for the conditions of the Salache campus, since it was evident that the flow rate was insufficient to meet the expectations that were raised during the design and construction of the decomposition system. |
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