Laws of Flow in Rough Pipes

  • Nikuradse J
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Numerous recent investigations (references 1, 2, 3, 4, and 5) have greatly increased our knowledge of turbulent flow in smooth tubes, channels, and along plates so that there are now available satisfactory data on velocity distribution, on the laws controlling resistance, on impact, and on mixing length. The data cover the turbulent behavior of these flow problems. The logical development would now indicate a study of the laws governing turbulent flow of fluids in rough tubes, channels, and along rough plane surfaces. A study of these problems, because of their frequent occurrence in practice, is more importamt than the study of flow along smooth surfaces and is also of great interest as an extension of our physical knowledge of turbulent flow.

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  • J. Nikuradse

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