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leaf blower
If the jet of air was quite larger than the area under study you might gain some insight as to the new flow,but without all the surrounding air moving at the same velocity,it would not represent 'driving' conditions.The calm,still air would be attracted to the fast,low pressure air of the blower jet,flowing towards it.
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Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
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