Computer programs for the calculation of non-isothermal air flow in rooms have been developed in the last years as reasonable precise and effective tools for non-conventional and difficult tasks in air conditioning technology. This paper shows possibilities based on the additional numerical calculation of the convective mass transfer. Several simple examples describe the influence of the hood and the room air flow on the convective heat and mass transfer. Based on this knowledge the optimal arrangement of the hoods, the air outlets and the air inlets can be determined.

The potential for using a large eddy simulation (LES) computational fluid dynamics (CFD) model to analyze building indoor air quality (IAQ) and ventilation problems was investigated. The LES model was developed by the Fire Science Division of NIST to simulate the transport of smoke and hot gases during a fire in an enclosure.