Indoor Air Flow Analysis for the Demo Building in City Garden (II)

Helen Xing

Simulation Improvement

Impose the air velocity in the south at some distance from the building and expand the simulation boundary. This can help to identify that if the size of the courtyard will affect indoor airflow through affecting the airflow field around the building.

Add another symmetric block and simulate the whole 12x12 building, which come closer to the real case.

Assumptions

A uniform wind of 0.5m/s is imposed at 6m away from the south window of the building. 

Others are the same as the assumptions used in the first simulation.

Results

The attached pictures are the calculated indoor airflow field at the height of 1.2m.

Fig.1 The ground floor of Scheme1, 3D

Fig.2.  The ground floor of Scheme1, plan

Fig.3. The ground floor of Scheme2, 3D

Conclusion

These two flow fields are compared in detail, which shows that there is no big difference between large courtyard and small courtyard.  So, we need to consider some other factors to value these two designs.   

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