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A correctional prediction for airflow rate of natural ventilation with wind fluctuation

Tan G, Zhu Y, 2002
air flow | mathematical modelling | natural ventilation
Bibliographic info: Proceedings of Room Vent 2002 (8th International Conference on Air Distribution in Rooms) - 8-11 september 2002 - Moltke's palace, Copenhagen - Denmark - pp 561-564, 2 Fig., 1 Tab., 5 ref.
Languages: English

CFD and fluid net models used for natural ventilation designs do not consider the impacts of fluctuating characteristics to the mean airflow rate. This paper presents first a correctional method for predicting mean airflow rate of natural ventilation when the average wind velocity is more important than velocity fluctuation. A correctional coefficient for airflow resistance of multi-zone models is deduced. This method is then applied to a big atrium of a naturally ventilated five floor laboratory. The calculated airflow rates using the correctional method are much closer to measured data than those calculated with traditional method.


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