Modelación numérica para determinación de la eficiencia de los sumideros de aguas lluvia tipo T45 aplicando mecánica de fluidos computacionales

Abstract

The objective of this experimental work is to determine the hydraulic efficiency in the collection of water in sumps implanted in urban roads. For the elaboration of the numerical model, it was based on the results of a 1: 4 physical hydraulic model carried out and previously tested in the Faculty of Civil and Mechanical Engineering of the Technical University of Ambato. Based on this research, a real-scale three-dimensional numerical model was created with software for the application of computational fluid mechanics (CFD), which allowed the simulation and analysis of results. The research focuses on T45 type sink models based on the Ecuadorian Vial Standard NEVI-12. The conditions for the simulation of the three-dimensional model were the same as those of the investigation at the 1: 4 scale, the transversal slope (pumping) of 2% and 4%, the longitudinal slopes of 0.5% and 4%, the inflow flows to real scale for a sink (Scenario 1): 16.91, 47.85, 79.75 and 111.65 lt / s; for two series sinks (Scenario 2): 20.74, 48.17, 79.11 and 111.65 lt / s. By means of the composition of transversal, longitudinal slopes and the admission flows, 32 combinations were created to be simulated, the same ones that demonstrated the efficiency of the T45 sinks. It was determined that increasing a series sink increases the efficiency of the same, but in a drainage system analysis it does not guarantee that the efficiency is doubled, so it depends a lot on the geometry of the grid and the road design.