Influencia del Y Plus en el Valor del Esfuerzo Cortante de Pared a través Simulaciones empleando Dinámica Computacional de Fluidos

Abstract

© 2018 Centro de Informacion Tecnologica. All rights reserved. In this work we studied the influence of Y plus (y+) on friction forces by computational fluid analysis to evaluate wall shear stress () and the total drag coefficient (Cd) using a commercial Computational Fluid Dynamics (CFD) software, ANSYS-FLUENT V16.1. The analysis was made on the hull wall of a submarine autonomous vehicle; the Reynolds number used was 1.36 x106, based on the diameter of the submarine hull. The results showed that even though the y+variation is within the viscous sublayer (y+< 2) there is a dependence of the shear wall stress and drag coefficient results according to this parameter. For coarse meshing (y+= 1.55) and extra-fine meshing (y+= 0.00375); the percentage of variation of the wall shear stress was 74% and for the total drag coefficient was 44.3%; while the variation of the simulation time was 71%.