File:An Experimental Investigation of the Circumstances Which Determine Whether the Motion of Water Shall Be Direct or Sinuous, and of the Law of Resistance in Parallel Channels (1883) (14763938182).jpg

Identifier: philtrans06508925 (find matches)
Title: An Experimental Investigation of the Circumstances Which Determine Whether the Motion of Water Shall Be Direct or Sinuous, and of the Law of Resistance in Parallel Channels
Year: 1883 (1880s)
Authors: Reynolds, O.
Subjects: Proceedings of the Royal Society of London Philosophical Transactions of the Royal Society
Publisher: Royal Society of London

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but with a view to testthis idea, the homologues Q and R, which related to the same incrusted pipe beforeand after being cleaned were drawn, and their agreement is such as to show thatfor such pipe the effect of incrustation is confined to the effect on the diameter of thepipe, and on the value o£ n which it raises to 2. This, however, was a large pipe andthe velocities a long way above the critical velocity, so that it is quite possible thatthe same incrustation in a smaller pipe would have produced a somewhat differenteffect. The general result of this diagram is to show that throughout the entire range—^from pipes of 0^000014 to 0^5 in diameter, and from slopes of pressure ranguig from 1 to 700,000—there is not a difference of more than 10 per cent, in the experimentaland calculated velocities, and with very few exceptions the agreement is within 2 or3 per cent., and it does not appear that there is any systematic deviation whatever. Reyrvolds , Phil. Trams. 18 83. Plxiie IZ \
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