Simulation of unsteady flow in viscoelastic pipes

M. Firkowski, K. Urbanowicz, H. F. Duan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)


The paper focuses on modeling of unsteady flows in a hydraulic system built of a pressure tank, a plastic pipeline and a quick-closing valve. The influence of unsteady friction as well as the experimentally obtained creep function (necessary for modeling retarded strains) on simulation results was investigated. In addition, the effectiveness of the dimensionless parameter P known from the literature was analyzed, especially in the context of rejecting an unsteady term decision. Detailed investigations on the variability of terms describing unsteady friction have shown that one should still look for a dimensionless parameter with the help of which it will be possible to decide on the friction model before making the calculations. The quantitative analysis carried out showed that the use of unsteady hydraulic resistance in simulated runs brought simulated results closer to experimental results.

Original languageEnglish
Article number519
JournalSN Applied Sciences
Issue number6
Publication statusPublished - Jun 2019


  • Frequency dependent friction
  • Method of characteristics
  • Unsteady flow
  • Viscoelastic pipe
  • Water hammer

ASJC Scopus subject areas

  • Engineering(all)
  • Environmental Science(all)
  • Materials Science(all)
  • Physics and Astronomy(all)
  • Chemical Engineering(all)
  • Earth and Planetary Sciences(all)

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