Simulación de estructuras sometidas al arrastre por corrientes y oleaje marino: Aproximación numérica del coeficiente de arrastre debido al oleaje marino sobre una monopila parcialmente sumergida

Abstract

The present work shows the study of the drag coefficient for a pile-type structure, semi-submerged, which is subjected to marine waves. First, a literature review describes the marine operations for which marine structures are used, their types, structural safety, the risk to which they are exposed and the platforms that exist in Ecuador. The current and wave conditions of the Ecuadorian coast are determined and what is related to the forces exerted by a flow on a submerged body is shown. In the second part, the methodology that was established for the development of the simulation using the ANSYS software is described. It began with a 2D analysis to determine the drag coefficient for different Reynolds number values, indicating the process that was carried out for the creation of the 2D domain, meshing, selection of the solution method, input of conditions and calculation. Subsequently, the 3D analysis is given way and the drag coefficient for a semi-submerged structure is determined. The simulation process in the 3D domain is shown in the same way, The values of the drag coefficient in the 2D problem were verified. For 3D analysis, results of drag coefficients showed that the drag coefficient increases with the percentage of submerged column and decreases with the speed of marine waves.