Investigation of Flow and Concentration Fields in a Cross-Ventilated Building

As Experimental methods are usually quite costly, the use of computational fluid dynamics (CFD) techniques is beneficial in the prediction of flow and concentration fields. This paper presents an investigation on indoor flow field and its effect on pollutant dispersion. It also compares the capabilities of three different turbulence models in flow and concentration fields predictions in a cross-ventilated building with a pollutant outlet in the middle of the building floor. Standard k-ε (SKE), RNG k-ε, and realizable k-ε are the three turbulence models that are examined. The standard k-ε model has demonstrated the best performance in the entrance region of the building whilst the RNG k-ε model has shown better results as the flow moves toward downstream.

Keywords:

Computational Fluid Dynamics (CFD) , Flow field , Concentration Field , Pollutant Dispersion , Cross-Ventilation