A four-equation friction model for water hammer calculation in quasi-rigid pipelines

An analysis of fluid–structure interaction coupling mechanisms in liquid-filled viscoelastic pipes subject to fast transients

“…This behavior is not generally observed when one looks at the responses to transient events in elastic pipes. In this case, the Poisson coupling mechanisms turn the pressure responses of the fluid-pipe system to be significantly distinct from the case when the couplings are disregarded for many cycles of the transient (Riedelmeier et al, 2014;Ferras et al, 2017b;Ghodhbani and Haj Taïeb, 2017;Wu et al, 2020). Thus, this similarity can be attributed to the viscoelastic behavior of the pipe.…”

A new model for fluid transients in piping systems taking into account the fluid–structure interaction

“…They showed that the inclusion of transient friction improved the calculated pressure responses. Lately, Ghodhbani and Haj Taïeb (2017) also included Zielke's friction in their four-equation model to show that when both FSI and transient friction are applied in the modeling, the pressure signals obtained in free-end pipeline are better captured.…”

Simulation of unsteady flow in viscoelastic pipes

“…In these pipelines, as well as in metal, transient states may occur during the flow of liquids. From previous work carried out by the authors of this study [28][29][30][31], it turned out that the phenomena accompanying unsteady flows in metal pipelines such as: cavitation [1,7,14,21,35], unsteady friction [5,13,[25][26][27] or the interaction of the walls of the pipe with the flow (fluid structure interaction) [9,11,16] also plays an important role in plastic pipes. The phenomenon that is most responsible for flow damping is the viscoelasticity of the material of the pipe [2,10,[28][29][30][31].…”