Computer Simulation and Analysis of the Laminar Boundary Layer Over NACA0012 Airfoil Using Ultra-Low Reynolds Number

Abstract

This work presents an application of the virtual boundary method for simulations with ultra-low Reynolds number over an profile NACA0012 airfoil type. The incompressible flow is solved through numerical solution of the Navier-Stokes equations (direct simulation - DNS), using a model of immersed boundaries to model the airfoil. This methodology allows the modeling of complex geometries immersed in the flow through two independent grids: one Eulerian to represent the fluid and a Lagrangian to model the fluid-structure interface. The analysis of the boundary layer is widely studied phenomena in turbulence, by definition, are observed in three-dimensional flows. This work treat of an approximation of laminar boundary layer in the case of two-dimensional flow. Results for modeling the laminar boundary layer are presented for the airfoil profile ,subject to attack angles 2, 8 and 30 degrees, and the phenomena of thickening of the boundary layer and the bubble separation and are discussed.