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An Improved Transmission Line Model for Dynamic Laminar Flow Through Tapered Tubes

[+] Author Affiliations
Travis Wiens

University of Saskatchewan, Saskatoon, SK, Canada

Jeremy ven der Buhs

Bourgault Industries, Ltd., St. Brieux, SK, Canada

Paper No. FPMC2018-8881, pp. V001T01A043; 10 pages
  • BATH/ASME 2018 Symposium on Fluid Power and Motion Control
  • BATH/ASME 2018 Symposium on Fluid Power and Motion Control
  • Bath, UK, September 12–14, 2018
  • Conference Sponsors: Fluid Power Systems and Technology Division
  • ISBN: 978-0-7918-5196-8
  • Copyright © 2018 by ASME


This paper presents an improved method for time-domain modelling of transient laminar flow through tapered tubes. This method is based on the transmission line method (TLM), a technique using transfer functions and delays to calculate the pressures and/or flows at the ends of the tube. However, unlike previous methods that are limited to non-tapered tubes or are inaccurate at low frequencies, the method presented here is applicable across a wide range of taper ratios, dissipation numbers, and frequency content. The new model is compared in the frequency domain to a boundary value problem solution and in the time domain to a method of characteristics solution.

Copyright © 2018 by ASME



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