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

Publication Type

Conference Proceedings

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.

Conference Name

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

Volume

3(3)

Year of Publication

2005

Conference Location

Beijing, China

Publisher

Tsinghua University Press

Pagination

2849-2853