Abstract
With the increase of urban population, vehicle traffic and human activities also
increase rapidly, resulting in a large number of particulate emissions, which seriously
threaten the physical and mental health of residents in the community. The diffusion
of particulate matter in indoor ventilation environment is affected by many factors, so
it is of great significance to study the transport mechanism and diffusion
characteristics of particulate matter in indoor ventilation environment.
Suspended particulate matter is the main pollution source of indoor air, which
can enter the respiratory system of human body, causing many disease symptoms and
various adverse effects, and posing a great threat to human health. At present, many
studies on inhalable particles mainly focus on diffusivity and physicochemical
characteristics of different particles, indoor and outdoor concentration relationship,
and differences of different ventilation systems, etc., but few studies on the diffusion
process of suspended particles with different particle sizes from outdoor environment
to indoor environment under specific flow field conditions. The transport and
diffusion process of particulate matter from outdoor to indoor plays a decisive role in
indoor air quality. In this paper, experimental and numerical simulation methods were
firstly used to study the process, and the gas-solid two-phase flow characteristics of
indoor inhalable dust were analyzed.
The study on the diffusion characteristics of particulate matter has been widely
applied, such as the analysis of the diffusion characteristics of particulate matter in
residential areas, urban water bodies and other related scenes. The analysis and
control of particle diffusion characteristics with higher efficiency and accuracy has
always been a research hotspot. With the continuous innovation of kinematic
technology and gas flow technology, the current technical level has laid a solid
foundation and provided a solid theoretical basis for the analysis and control of
particle diffusion characteristics. This design using Fluent software under different
dispersion characteristics of particulate matter in indoor and ventilated environment,
through the analysis of characteristics of particle deposition in ventilating duct, and
