NUMERICAL SIMULATION OF THE PERFORMANCE OF WIND CATCHER

Miss Liu Li and Dr. C.M.Mak

Department of Building Services Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China. 

Background

The windcatcher is one type of green features for providing better natural ventilation. The buildings with only window openings usually have poor ventilation, especially when the windows are small (as shown in Fig 1 (a) and (b)). The windcatcher can change the direction of wind and channel the fresh air into rooms (as shown in Fig 2).

Fig 1 Rooms with and without windcatcher  

Fig. 3 Contours of dynamic pressure (CFD simulation)

Fig. 4 Contours of total pressure (CFD simulation)

Figures  were prepared by Miss Liu Li (under the supervision of Dr.Mak)

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