Key words: Computational Fluid Dynamics, indoor airflow, standard k-ε, SST k-ω, local mean age.

Abstract: The goal of this work is to investigate the performance of two eddy-viscosity turbulence models, standard k-ε and SST k-ω, in predicting the two-dimensional airflow in a rectangular room and the local mean age of air using an open-source simulation tool, OpenFOAM. Two geometries were analyzed: the room used in the first case (Bartak, 2001), which consists of a lateral air entrance and an outlet on the top of the opposite side, and the experimental room from the second case (Annex 20 room by Nielsen, 1990), which represents a large rectangular room where the air is supplied horizontally on the upper left and is exhausted through the opening on the lower right of the opposite side. The velocity profiles and local mean age of air were analyzed in both cases.