In a displacement ventilation system a thermal plume which is formed over a heat source evokes circulation flows, thermal stratification of the room air and air transport from the supply to the outlet opening. The results of experiments on plu

The macroscopic behaviour of heat and airflow transport within an atrium is analyzed based on the result of a microscopic numerical stimulation. The result of the numerical simulation agreed fairly well with that of the model experiment. In orde

A recently proposed tracer gas method - the homogeneous emission technique-which is suitable for measurement of ventilation air distribution in large enclosures is explained. It is discussed how a CFD-simulation of tracer gas distribution could be utilised to optimise the design of a tracer gas experiment in order to achieve the requested information at a minimum cost.