其他摘要：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.
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