Abstract
The transport routes of contaminants from outdoors to indoors through the ventilation system have been recognized as dominant pathways. These contaminants originating outdoors may deteriorate the indoor air quality level and adversely affect on human health. In order to prevent particulate matter contamination of indoor environments, the control of the transport of particles from outdoors to indoors through ventilators is important, and the use of a vertical ventilator is one of the effective methods to prevent the transport. In this paper (Part 1), visualization measurement was performed by using a PIV system to measure airflow in a vertical ventilator model. Images of smoke structures were recorded and processed to provide detailed validation data for CFD simulations. Furthermore, CFD simulation by using three types of turbulence models, Low Re type k-ε model, RNG k-ε model and SST k-ω model, and by considering same geometry and boundary conditions for the experimental vertical duct model were carried out. The difference between the peak velocity values measured with the PIV system and CFD was approximately 10 %.
