Modelagem da dispersão de poluentes leves em ambientes complexos

Abstract

This work proposes a method for simulating the transport of pollutant, driven by wind fields in complex environments. The method consists in dividing the advective-difusion equation into two components, laminar and turbulent. The former

represents the wind fields, obtained from a few samples properly collected at the environment boundary. The wind field estimation comes from the interpolation of those samples, for determining the boundary conditions of the simulation environment, and from numerical solution of the continuity equation for potential flows. The second component, representing the turbulent part of the flow, consists of a non-homogeneous scalar field of difusion coefcients defined in the ambient, in accordance with a typical model for the turbulent difusion, based on the fluid

mechanics phenomenology. The proposed methodology avoids the need of solving the Navier-Stokes equations and gives the simulation more performance. The model, besides being computationally cheap, gives good precision on th