Simulación mediante dinámica de fluidos computacional (CFD) del efluente en el clarificador secundario de la PTAR Udlapark

This work focuses on the application of computational fluid dynamics (CFD) to simulate the hydraulic behavior of the flow in the secondary clarifier of the UDLAPARK wastewater treatment plant (WWTP) through the OpenFOAM open source platform. , which includes numerical calculation methods that iteratively solve the Navier-Stokes equations to predict fluid motion. In principle, the pre-processing was developed with the definition of the domain by constructing the circular geometry with its respective real dimensions and generating the computational mesh in the SALOME software. Next, the simulation was run for the secondary clarifier where the regions of interest of the flow and the initial conditions of the system regarding the velocity and pressure parameters were specified. The aim was to reach the steady state of the hydraulic model in a simulation time of 300 seconds, using the solver for incompressible flows "interFoam", with the RANS (Reynolds-Averaged Navier-Stokes) turbulence model and the "PIMPLE" solution algorithm. which is characterized by highlighting the calculation of speed and pressure with greater stability. Finally the numerical convergence was reached after 225 seconds and the post-processing could be carried out using the visual tool ParaView where it was possible to observe the three-dimensional projection of the hydraulic behavior of the secondary clarifier and the analysis of the flow field was carried out. by means of the visual application of the velocity vector field which determined the distribution and direction of the flow.