Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
MATHEMATICAL MODELING OF POLLUTANT DISPERSION AROUND AN ISOLATED OBSTACLE UNDER DIFFERENT ATMOSPHERIC STABILITY CONDITIONS
Submission Author:
Jamily Stocco , ES
Co-Authors:
Jamily Stocco, Bruno Furieri, Vitor Lavor, ISRAEL COSTA, Enilene Lovatte, Maria Clara Schuwartz Ferreira
Presenter: Jamily Stocco
doi://10.26678/ABCM.ENCIT2018.CIT18-0618
Abstract
In the present work, numerical simulations were carried out using CFD to study gaseous pollutants dispersion behavior around an isolated building, under different atmospheric conditions. The mathematical modeling was based on the solution of conservative equations (mass, momentum, energy and chemical species) using the standard κ-ε turbulence model. The numerical results were validated wind tunnel data available in literature. The unstable atmospheric condition presented the highest levels of turbulence in the stagnation zone as well as higher TKE generation near the ground. The dispersion plumes for the tested atmospheric stability scenarios showed no significant differences in the concentration profile. The most significant concentration values were found in the center line of the pollutant plume, presenting the largest concentration differences in the simulated stability conditions. Numerical simulation has proved to be a powerful tool in the analysis of the concentration field and a feasible alternative in environmental impacts evaluation of new sources in urban environment.
Keywords
atmospheric dispersion, Turbulence, Thermal Stratification, computational fluid dynamics.
