3DFLOW program development, validation by cases and indoor airflow prediction

The airflows of rooms are different with the ventilation methods, indoor heat sources distribution, as well as room structures themselves. To understand the features of indoor airflows, engineers and researchers use laboratory tests, CFD techniques and field investigations to probe into the essences of indoor air movements. At present, CFD methods are widely used in predicting space air distributions because of lots of well-known advantages. On the basis of long-term research work, the 3DFLOW codes were developed, which is based on the standard three-dimensional ? e two-equation turbulence model, with the item of buoyant effect modified, wall functions applied to be dealt with solid boundary conditions and SIMPLE algorithm adopted. Tecplot software, which is a post-plot software, is combined to visualize the numerical results. The agreement between the numerical prediction and the experimental data of room airflows is excellent on the average.
Keyword ? e model, ventilated space, indoor airflow, numerical simulation