A2_7 Slamming doors due to open windows

David Marshall, Thomas Hands, Ian Griffiths, Gareth Douglas


The force required to close a door in a small room with a window open can be observed to be less than that required if the window is shut, this is due to the behaviour of air around the door as it is closed. This paper presents a model for this phenomena. It is found that the forced flow of air around the door is the major cause of the effect. The movement of the door when closing is barely changed until the door has nearly closed, at which point the force retarding the door increases substantially.

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