Letter | Published:

The Critical Velocity in Pipes

Nature volume 113, page 643 (03 May 1924) | Download Citation

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Abstract

IN the course of a recent conversation, Major A. R. Low pointed out to me that one state of steady fluid flow will not change to another unless there is a difference in the energies corresponding to the two types, or, as I prefer to put it, no change from one state to the other will occur spontaneously unless the change involves a dissipation of energy. If we call p/ the head in C.G.S. units, then in viscous flow the head lost in a length “x of a pipe can be written in the form

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  1. 26 Addiscombe Road, Croydon.

    • H. M. MARTIN

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DOI

https://doi.org/10.1038/113643a0

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