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RESEARCH PAPERS

Viscous Dispersion in Water Hammer

[+] Author and Article Information
M. L. Walker

Mechanical Engineering Department, Howard University, Washington, D. C.; Department of Mechanical Engineering, Carnegie Institute of Technology, Pittsburgh, Pa.

E. T. Kirkpatrick

Department of Mechanical Engineering, University of Toledo, Toledo, Ohio

W. T. Rouleau

Department of Mechanical Engineering, Carnegie Institute of Technology, Pittsburgh, Pa.

J. Basic Eng 82(4), 759-763 (Dec 01, 1960) (5 pages) doi:10.1115/1.3662740 History: Received October 22, 1958; Online November 03, 2011

Abstract

When a column of fluid moving with uniform velocity is instantaneously stopped at the downstream end a pressure wave is propagated upstream. In an inviscid fluid the wave is a step discontinuity, and the pressure so calculated serves as an easily obtained upper bound for all practical “water-hammer” problems, the exact solution of which may be either difficult or impossible to obtain. This paper describes an analysis of viscous dispersion in relation to the upper bound. The conclusion is reached that in problems of practical interest the bound is not significantly changed by the dispersive effects of viscosity.

Copyright © 1960 by ASME
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