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Unsteady flow effects due to fluctuating wind pressures in natural ventilation design - instantaneous flow rates.

The paper presents the results of a study into the effects of unsteady wind pressures on the mean flow rates in certain types of purpose-designed naturally ventilated buildings. The study used non dimensional parameters and the results should therefore cover a wide range of conditions and should be of general application. It is concluded that unsteady) effects are restricted to a relatively narrow band of conditions. These conditions have been quantified in terms of non dimensional parameters.

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