TY - GEN
T1 - Effect of Pipe-End Material on Water Hammer and Cavitation in Viscoelastic Pipelines
AU - Ghodhbani, Abdelaziz
AU - Hadj-Taieb, Lamjed
AU - Elaoud, Sami
N1 - Publisher Copyright:
© 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.
PY - 2023
Y1 - 2023
N2 - Water hammer in viscoelastic pipelines can be accurately predicted by the classical model. However, discrepancies are observed in case of cavitation, even by use of the classical viscoelastic discrete gas cavity model (VE-DGCM). This paper deals with the improvement of the numerical solution of water hammer and cavitation in viscoelastic pipelines by involving the pipe-end rigidity in boundary conditions. The method of characteristics (MOC) is used to calculate fluid transient in both downstream and upstream-valve HDPE straight pipe, which are rigidly anchored. The classical viscoelastic modelling is used for both cavitating and non-cavitating flows. Pressure as well as circumferential strain are calculated at the valve and at the midstream of the pipe. Two types of pipe-end material are compared therein: the rigid end and the viscoelastic end. The former is considered as the rigid material of the pipe and the reservoir, while the latter is restricted to the pipe. The method consists in incorporating the end behavior in the boundary conditions of the problem. The classical viscoelastic discrete vapour cavity model (VE-DVCM) and the VE-DGCM are used to solve the problem. The calculation shows that the first assumption leads to more accurate results than the second in the two pipe locations.
AB - Water hammer in viscoelastic pipelines can be accurately predicted by the classical model. However, discrepancies are observed in case of cavitation, even by use of the classical viscoelastic discrete gas cavity model (VE-DGCM). This paper deals with the improvement of the numerical solution of water hammer and cavitation in viscoelastic pipelines by involving the pipe-end rigidity in boundary conditions. The method of characteristics (MOC) is used to calculate fluid transient in both downstream and upstream-valve HDPE straight pipe, which are rigidly anchored. The classical viscoelastic modelling is used for both cavitating and non-cavitating flows. Pressure as well as circumferential strain are calculated at the valve and at the midstream of the pipe. Two types of pipe-end material are compared therein: the rigid end and the viscoelastic end. The former is considered as the rigid material of the pipe and the reservoir, while the latter is restricted to the pipe. The method consists in incorporating the end behavior in the boundary conditions of the problem. The classical viscoelastic discrete vapour cavity model (VE-DVCM) and the VE-DGCM are used to solve the problem. The calculation shows that the first assumption leads to more accurate results than the second in the two pipe locations.
KW - Column separation
KW - Method of characteristics
KW - Viscoelasticity
KW - Water hammer
UR - http://www.scopus.com/inward/record.url?scp=85136976664&partnerID=8YFLogxK
U2 - 10.1007/978-3-031-14615-2_18
DO - 10.1007/978-3-031-14615-2_18
M3 - Conference contribution
AN - SCOPUS:85136976664
SN - 9783031146145
T3 - Lecture Notes in Mechanical Engineering
SP - 151
EP - 160
BT - Design and Modeling of Mechanical Systems - V - Proceedings of the 9th Conference on Design and Modeling of Mechanical Systems, CMSM 2021
A2 - Walha, Lassaad
A2 - Haddar, Mohamed
A2 - Jarraya, Abdessalem
A2 - Djemal, Fathi
A2 - Chouchane, Mnaouar
A2 - Aifaoui, Nizar
A2 - Benamara, Abdelmajid
A2 - Chaari, Fakher
A2 - Abdennadher, Moez
PB - Springer Science and Business Media Deutschland GmbH
T2 - 9th International Congress on Design and Modeling of Mechanical Systems, CMSM 2021
Y2 - 20 December 2021 through 22 December 2021
ER -