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RESEARCH PAPERS

Complex Wavespeed and Hydraulic Transients in Viscoelastic Pipes

[+] Author and Article Information
Lisheng Suo, E. B. Wylie

Department of Civil Engineering, The University of Michigan, Ann Arbor, MI 48109

J. Fluids Eng 112(4), 496-500 (Dec 01, 1990) (5 pages) doi:10.1115/1.2909434 History: Received January 29, 1990; Online May 23, 2008

Abstract

The classic formula for waterhammer wavespeed is extended to calculate the complex-valued, frequency-dependent wavespeed in a viscoelastic pipe, which takes into account the effect of viscoelasticity of pipe wall material on wave propagation. With the complex wavespeed, the standard impedance or transfer matrix is directly used to analyze resonating conditions in systems including viscoelastic pipes, and the impulse response method presented previously by the authors is applied to compute nonperiodic transients. Numerical results are compared with experimental data and good agreement is observed.

Copyright © 1990 by The American Society of Mechanical Engineers
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