Comparación modelo CFD 2D y 3D al realizar el análisis de esfuerzos, deformaciones y vibraciones de las cuerdas vocales

Abstract

This thesis work addresses the comparison between a 2D and 3D CFD (Computational Fluid Dynamics) model when analyzing the stress, deformations and vibrations of the vocal folds. This research was carried out with the objective of identifying and analyzing the variables that are involved in phonation based mainly on scientific references, in order to establish a geometric model based on the references of the vocal folds, taking into account the conditions of the vocal folds. relevant physiological and anatomical vocal cords, with the purpose of being able to carry out numerical simulations analyzing the incidence of the air flow on them, finding and establishing the critical points and the areas with greatest influence, the methodology used included an adequate compilation of relevant information to all the characteristics of phonation, to be able to determine the variables, properties and geometry, taking into account that with this the development of 2D and 3D models was carried out, in search of a realistic simulation, using the ANSYS Software section Workbench to carry out The CFD simulation analysis was also used to do a transient structural analysis and deformations, finally a vibration analysis, under some characteristics, boundary conditions and constants of the most important variables, as well as its fluid, frequencies, zones of criticality, areas and in accordance with what was done in other studies. Once the graphs and figures achieved were analyzed, the results obtained revealed a better capacity of the geometric models, when taking into account the compilation of the two geometries, a coherent model is given with positive results when making the comparison with previous research. achieving greater precision in this, one of the most relevant observations was the similarity of the dynamic movement of the vocal folds in the results obtained in the 3D simulation, with respect to medical patterns, also the great difference in the vibration graphs, deformations and stresses between 2D and 3D, giving greater precision, visual representation and more precise and accurate dynamic responses for the 3D model, however 2D offers a meticulous analysis with good reliable results and when carrying out it would save time in its execution with longer time spans to analyze; This work contributes to future practical applications, whether for research or for the execution of some new examination and therefore acquiring a set of properties, characteristics, restrictions, that involve and allow us to understand said physical phenomenon from a more precise physiological field, in order to support medical progress in terms of preventing disorders or even developing possible treatments, since the vocal tract, which anatomically is the one that interacts with the air coming from the lungs, consists of human tissues with properties that, despite allowing phonation, have limitations that They can incur illnesses and disabilities that in turn cause a series of problems when interacting socially as an individual.