Abstract
There is increasing concern about health effects of particulate pollutants such as SARS, avian influenza (also human influenza), diesel emission particles, and their restrictions are becoming tight. These are contributor to infectious diseases. Because of these situations, particle motions and flows around the human with periodic breathing are numerically solved to predict the gas-particulate two phase flows. Very little studies have been reported to deal with the theme of human with time-dependent particle motion for human inhalation. Since the targeted particles are bacteria and virus, particle size selected at 1μm and 100nm in diameter with density of 10kg/m^3, respectively. Three-dimensional numerical simulation was employed using Lagrange approach for particle motion and the standard k-ε model for flows. Our research is a unique dealing with nano-size particle motions. For speeding-up, parallel computation is applied. The authors examined the influence of source distance and particle diameter on particles inhalation. In the calculation, the effect of the distance between the human and the pollutant region was clarified in the inhalation of such SPM. This study is expected to help the prevention of unknown infection spread to come.
