NUMERICAL MODELING OF TURBULENT FLOWANDAIR POLLUTANT DISPERSION IN URBAN STREET CANYONS
Keywords:
mass transfer in the atmosphere, vehicle emissions, urban development, Navier–Stokes equations, numerical algorithm, Crank–Nicholson scheme, Jacobi methodAbstract
Large cities often face challenges in providing an eco-friendly living space. This is crucial in residential areas where the majority resides, aiming for high social and envi ronmental comfort. Key pollution sources include industrial sites, utilities, and notably, road traffic, which is a major contributor. City overpasses can significantly exacerbate pollution levels. Computational fluid dynamics offers effective tools for analyzing and pre dicting pollutant dispersion, considering air flow dynamics and urban structures. This study focuses on modeling pollutant spread in turbulent flows within street canyons, employing the Navier–Stokes equations, Poisson’s equation for pressure, and advection diffusion equations, solved using a Crank-Nicholson scheme. The findings are presented graphically, with interpretations provided.
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