This research studies the behavior of the dispersion of a pollutant cloud, through the simulation of an eddy field velocity. To do so, a mathematical model was developed, with base in the Monte Carlo simulations, in order to analyze all statistic aspects, present in this process. A computational program was developed, so that it can be possible to establish the behavior of the cloud size, in a ...

As stated by the World Health Organization (WHO), air pollution in urban environment is silent cause for around seven million death worldwide. This due to indoor and outdoor exposure various pollutants emitted built environment: as global trend an increase of population living towns, this issue predicted become even worser. a matter fact, can trapping instead their dispersion. In work, dispersi...

The aim of this study is to investigate the problems caused by discharge of polluted air from tunnels into the environment with a specific focus on residential areas. In city tunnels, portal or stacks, pollutant management is a big challenge. Nowadays, air quality management, particularly in urban tunnels, is considered as a part of the ventilation system design. The goal is to see the environm...

This article is the second in a two-paper series presenting results from wind tunnel and computational fluid dynamics (CFD) simulations of flow and dispersion in an idealized model urban neighborhood. Pollutant dispersion results are presented and discussed for a model neighborhood that was characterized by regular city blocks of three-story row houses with a single 12-story tower located at th...

This paper presents a numerical investigation of air pollutant transport from the Los Angeles Basin to Grand Canyon National Park (GCNP) under the stably stratified wintertime, synoptic highpressure conditions that existed during lo-13 February 1987. The Colorado State University Regional Atmospheric Modeling System (CSU-RAMS) is used to develop fields of different atmospheric variables for 54 ...

This work describes the computational fluid dynamic (CFD) simulation of flow and pollutant dispersion around a cube. The work attempts to model the characteristics of an atmospheric boundary layer type flow over a building which has a pollutant source at its roof centre. For the flow field, two different numerical schemes for the discretisation of convection have been employed namely the second...