Print Email Facebook Twitter Comparison of displacement and mixing diffusers Title Comparison of displacement and mixing diffusers Author Jiang, Z. Chen, Q. Moser, A. Technisch Physische Dienst TNO - TH Publication year 1992 Abstract In order to compare the performance of different supply diffusers of ventilation air, the airflow pattern, temperature stratification and contaminant dispersion in a furnitured office ventilated by three kinds of air diffuser were numerically investigated. The air diffusers studied in this paper are a quarter-cylinder displacement diffuser on the floor and mixing diffusers (linear and vortex diffusers) on the ceiling. The heat sources in the office are considered to be 50% convective and 50% radiative. The k-e two-equation model of turbulence is employed to predict the turbulent diffusion. The results show that the displacement diffuser provides a rather uniform flow field with low velocity in most areas, and the vertical temperature dfference from floor to ceiling is as high as 6 K. With the linear diffuser, the air velocity is high, and the temperature is uniform both horizontally and vertically. The air velocity generated by the vortex diffuser is moderate. The distributions of the temperature and the contaminant are rather uniform. Subject Airflow patternIndoor contaminantTemperature distributionNumerical simulationDisplacement diffuserMixing diffuser To reference this document use: http://resolver.tudelft.nl/uuid:f31b2a40-f942-407f-9adb-df81a866eddc TNO identifier 282251 Publisher Munksgaard, Copenhagen Source Indoor Air, 2, 168-179 Document type article Files To receive the publication files, please send an e-mail request to TNO Library.