Diseño y construcción de un sistema de azada y mecanismo de accionamiento de embrague para un motocultor.

Abstract

This work presents the hydrodynamic study of an adsorption column for contaminant removal. The present manuscript comprises four chapters. In Chapter 1, the basic concepts of water pollution and some current techniques for contaminant removal are mentioned, emphasizing adsorption and adsorptive materials available in the market. Additionally, Chapter 1 presents a review on the literature related to hydrodynamic phenomena in fixed bed adsorption column. The operational (pressure and inlet velocity) and constructive (height, diameter and adsorptive material packing characteristics) of an adsorption column, together with the fluid physical properties are described in Chapter 2. Subsequently, the methodology used for the hydrodynamic study of the adsorption column in the free software OpenFOAM is presented. In Chapter 3, the results obtained from simulations, i.e. pressure drop and velocity profile along the column, are presented. These results are analyzed based on the diameter of the particle, porosity and intrinsic permeability of the column packing. The simulation results are displayed by using the Paraview application. In Chapter 4, the conclusions obtained from the simulations are presented. Among the main conclusions it can be mentioned be the velocity profile and pressure drop across the adsorption column depend on grain size and porosity. The results show that outside the porous medium the velocity profile has a parabolic shape. Distinctly, the velocity profile inside the porous medium tend to be flat. With the effect of grain size, the larger the grain size, the lower the pressure drop. Further, an exponential relation between pressure drop and grain size was checked. Additionally, the simulations allowed to observe that pressure varies linearly along the adsorption column