Using DGCM to predict transient flow in plastic pipe

Kamil Urbanowicz, Anton Bergant, Huan Feng Duan, Michal Stosiak, Mateusz Firkowski

Research output: Journal article publicationConference articleAcademic researchpeer-review

Abstract

Transient flows with cavitation are commonly existent and observed in pressurized conveyance systems. The occurrence of large cavitation caverns accompanying hydraulic impacts in the pressurized pipes is particularly dangerous. There may then be interference of pressure waves traveling inside the pipe (especially between initial and secondary pressure waves). The maximum instantaneous pressures can rise in the most dangerous scenario to-magnitude that are twice as large as those calculated with a classic formula of Joukowsky. To protect these systems at the design stage it is advisable to estimate large pressure pulsations using appropriate numerical models. In this work transient cavitating flow in the plastic pipe was modeled using the modified discrete gas cavity model (DGCM). Retarded strain occurring in the studied plastic pipe was modeled with the aid of a convolutional integral of stress history and a derivative of the creep compliance function of the plastic pipe wall. In the simulation, the unsteady wall shear stress was determined using the recent Urbanowicz's computationally effective method.

Original languageEnglish
Article number012020
JournalIOP Conference Series: Earth and Environmental Science
Volume405
Issue number1
DOIs
Publication statusPublished - 20 Dec 2019
Event8th IAHR International Workshop on Cavitation and Dynamic Problems in Hydraulic Machinery and Systems, IAHR 2019 - Stuttgart, Germany
Duration: 9 Oct 201911 Oct 2019

ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

Cite this