Numerical simulation of pollutants dispersion by a finite element method based on control volumes / Simulação numerica de dispersão de poluentes pelo metodo de elementos finitos baseado em volumes de contole




The dispersion of pollutant species in the environment is a problem of interest due to the bad quality of the air that this can originate, mainly, in big cities. Numerical and experimental tools have been developed and used to predict the behavior of the dispersion of pollutants in the atmosphere. In this work, computational codes have been developed in Fortran 90 language to simulate the flow with heat and mass transfer by solving the Navier-Stokes equations and the transport equations in two-dimensional domains with obstacles inserted in the media representing for example an urban canyon. Simulations of the three-dimensional transport equations for a given profile of velocity have also been done. In the two-dimensional simulations, it was utilized finite element quadrilateral Lagrangians of four and nine nodes; and in the three-dimensional simulations, it was utilized hexaedral finite elements Lagrangians of eight and twenty-seven nodes. The numerical results of some applications have been obtained and, when possible, compared to results from the literature. Both presented satisfactory concordance


pollutants metodo dos elementos finitos equações de equações diferenciais parciais dispersão finite element method dispersion navier-stokes fluid dynamics poluentes navier-stokes equations dinamica dos fluidos partial differential equations

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