非稳态微生物污染物在建筑群内迁移的数值模拟

A numerical simulation to the pollution brought up by the transfer of unsteady microbes in the buildings

随着城市化进程的加快和城市中心人口密度的激增,微生物污染问题成为人们关注的热点。本文利用病毒群体动力学演化模型研究非稳态微生物污染的产生过程,并将模型结果作为非稳态污染源的源强引入污染物对流扩散方程。假设没有继发性感染,研究致病性微生物污染源对建筑群环境的影响,得到了建筑群表面及周围污染物浓度随时间的变化规律。假定致病感染浓度,得到了微生物污染源的影响范围,这为控制污染物扩散和建立致病微生物污染预警系统提供了理论指导。

The present paper is to bring about the author＇s numerical simulation to the pollution brought up by the transfer of unsteady microbes inside a building. As is knowna, with the rapid urbanization and dense population congested in the limited urban area, microbial pollutants have been becoming a hot problem to be attacked. For this purpose, we have adopted a non-linear population dynamic model of virus infection to simulate the unsteady development of pathogens in a room with infective patients. It is assumed that the pathogen inside the room is emitted outside from one sidewall （windows） of a building. Such an emitted pathogen can be taken as a surface source and introduced into a convection-dispersion equation to simulate the trans- mission of pathogen with airflow. Assuming there is no secondary infection, the time-dependent concentration distribution rate of disease microbial pollutants around building has been obtained. At the same time, the concentration of pathogen on the surface of another building can also deduced. Thus, the infectious area can be determined on the condition of disease virus concentration. Thus, the present research can be nsed to control the spread of airborne disease virus as well as to establish the virus-alarming system.