Maybe it is not generally known that air does not slide across surfaces but rather there is what is known as a thin boundary layer of air that can be visualized as being momentarily stuck to or momentarily detained by the surfaces of the wire mesh. Perhaps an analogy for the boundary layer would be like a large group of pranksters getting chased out of a fenced watermelon patch by a 12 gage shotgun. All clear the fence in a single leap carrying a melon but one prankster gets snagged by the barbed wire and is momentarily caught and detained just long enough to tear his pants and hide loose and then continues on. In the process, his melon gets smashed. The smashed melon represents the oil grabbing a particle of dust. The other melons escape capture.
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Today's Featured Article - The David Brown Rose Badge - by Samuel Kennedy. In the 13th century civil war was raging in England. Two English noblemen were involved in a conflict which became known as the War of the Roses. The Duke of York had as his emblem a white rose and the Earl of Lancaster had a red rose. Today the white rose is the official emblem of the county of Yorkshire and the red rose has been adopted by the neighboring county of Lancashire.
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