Numerical analysis of the mitigation of aerodynamic loads in low-rise buildings using spoilers with PID control
Palavras-chave:
Low-rise buildings, Pressure mitigation, PID control, Large Eddy Simulation (LES), Finite Element Method (FEM)Resumo
A numerical investigation is performed in this work to evaluate the influence of controlled spoilers on
pressure mitigation over low-rise building roofs. Considering that low-rise buildings are susceptible to severe
damages caused by wind action, spoilers are utilized along the roof windward edges to reduce the aerodynamic
load, which are controlled using PID control techniques. Numerical simulations are carried out using a semi-
implicit CBS algorithm, where linear tetrahedral finite elements are employed for spatial discretization in a
standard Galerkin procedure. Turbulence modeling is performed using Large Eddy Simulation and the flow
fundamental equations are written considering isothermal and incompressible conditions in arbitrary Lagrangian-
Eulerian kinematical description to take into account the spoiler angular motion. Two and three-dimensional
simulations are carried out using a typical low-rise building model, where the influence of controlled roof spoilers
and wall openings on the roof loading is evaluated. Wind tunnel predictions are utilized to validate the numerical
formulation proposed here.
