TY - CONF KW - Mixed convection KW - Airflow KW - CFD KW - Large indoor space KW - Pollutant dispersion AU - Buvaneswari Jayaraman AU - Elizabeth U Finlayson AU - Emily E Wood AU - Tracy L Thatcher AU - Phillip N Price AU - Richard G Sextro AU - Ashok J Gadgil AB -

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.

BT - Proceedings of the 10th International Conference on Indoor Air Quality and Climate C1 -

3

CY - Beijing, China LA - eng N2 -

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.

PB - Tsinghua University Press PP - Beijing, China PY - 2005 SP - 2849 EP - 2853 T2 - Proceedings of the 10th International Conference on Indoor Air Quality and Climate T3 - 10th International Conference on Indoor Air Quality and Climate TI - Comparison between experiments and CFD predictions of mixed convection flows in an atrium VL - 3(3) ER -