Comparison between experiments and CFD predictions of mixed convection flows in an atrium

TitleComparison between experiments and CFD predictions of mixed convection flows in an atrium
Publication TypeConference Proceedings
Year of Publication2005
AuthorsBuvaneswari Jayaraman, Elizabeth U Finlayson, Emily E Wood, Tracy L Thatcher, Phillip N Price, Richard G Sextro, Ashok J Gadgil
Conference NameProceedings of the 10th International Conference on Indoor Air Quality and Climate
Volume3(3)
Pagination2849-2853
PublisherTsinghua University Press
Conference LocationBeijing, China
Keywordsairflow, cfd, large indoor space, mixed convection, pollutant dispersion
Abstract

This paper compares results from a computational fluid dynamics (CFD) simulation of airflow and pollutant dispersion under mixed-convection conditions with experimental data obtained in our 7m x 9m x 11m high experimental facility. A tracer gas was continuously released from a 1 m2 horizontal source 0.5 m above the floor. Path-integrated concentrations were measured along multiple short and long sampling paths in three horizontal planes. A steady state CFD analysis was used to model these experiments. The Reynolds Averaged Navier-Stokes (RANS) equations were solved for the flow and temperature field using the commercial CFD software, StarCD. CFD results were compared with the measured path-integrated concentrations. Accuracy of CFD predictions was found to improve with inclusion of thermal effects, and further by using a low-Re turbulence model.