Turbulent recirculating flows in many types of ventilated rooms are numerically simulated three-dimensionally by means of k-e 2-equation turbulence model. The results obtained from numerical simulation are compared with those given by model experiments concerned with air velocity and contaminant diffusion.
The object of this study was to determine the feasibility of using a smoke sensor to monitor and control cigarette smoke levels in occupied spaces and also to determine whether the use of such a detector could result in energy savings. A smoke detector was built and tested. The experimental results show that the smoke sensor output is a function of cigarette smoke concentration and that the smoke sensor gives a rapid and continuous response.