Numerical investigation on wind pressure mitigation in low-rise building roofs using spoilers with PID control

Abstract

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 Characteristic-based Split 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 consider the spoiler angular motion. Two and three-dimensional simulations are carried out using a low-rise building model, where the influence of controlled roof spoilers is evaluated. Wind tunnel predictions are utilized to validate the numerical formulation proposed here.