摘要：This work presents a numerical model based on Computational Wind Engineering
(CWE) techniques to simulate the wind action over buildings. CWE deals with
application of Computational Fluid Dynamics (CFD) methodologies in classical
Wind Engineering problems, which are usually analyzed employing experimental
tools in wind tunnels. In Wind Engineering procedures the aerodynamic
analysis is performed to investigate effects of the wind action over structures
where the structural motion may be neglected. The Navier-Stokes equations for
viscous incompressible flows and a continuity equation based on the
pseudo-compressibility hypothesis are the governing equations for the fluid
analysis. The numerical model to simulate wind flows is obtained applying the
explicit two-step Taylor-Galerkin method on the governing equations. Spatial
approximations are performed using the Finite Element Method with eight-point
hexahedral elements and one-point quadrature, which leads to analytical
evaluations of the element matrices. Large Eddy Simulation (LES) is employed
to analyze the large scales of turbulent flows and the dynamic model is used for
the sub-grid scales modeling. Typical applications on building aerodynamics
are simulated in order to demonstrate the accuracy of the present
formulation.
