Foreword
Page: i-i (1)
Author: Hab. Eng. Ridha ENNETTA
DOI: 10.2174/9789815123760123010001
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Preface
Page: ii-iii (2)
Author: Abdelaziz Ghodhbani, Ezzeddine Haj Taïeb, Mohsen Akrout and Sami Elaoud
DOI: 10.2174/9789815123760123010002
PDF Price: $15
Review of Literature
Page: 1-38 (38)
Author: Abdelaziz Ghodhbani*, Ezzeddine Haj Taïeb*, Mohsen Akrout* and Sami Elaoud*
DOI: 10.2174/9789815123760123010005
PDF Price: $15
Abstract
This chapter presents a review of the literature related to fluid transients
involving column separation and vaporous and gaseous cavitation in pipelines. Basic
concepts are clarified, and the classification of water hammer and cavitation models is
presented. The historical development of fluid transients is described. The concept of
propagation of pressure pulses at sonic velocity through a straight pipeline is
presented.
Mathematical Development
Page: 39-64 (26)
Author: Abdelaziz Ghodhbani*, Ezzeddine Haj Taïeb*, Mohsen Akrout* and Sami Elaoud*
DOI: 10.2174/9789815123760123010006
PDF Price: $15
Abstract
This chapter gives a detailed description of the mathematical development
proposed for the study. The elasticity theory and the general theory of beams are
strongly present whereas some assumptions are adopted to simplify the analysis.
Numerical Calculation of Water Hammer
Page: 65-90 (26)
Author: Abdelaziz Ghodhbani*, Ezzeddine Haj Taïeb*, Mohsen Akrout* and Sami Elaoud*
DOI: 10.2174/9789815123760123010007
PDF Price: $15
Abstract
In this chapter, the Method of Characteristics (MOC) is detailed and used
to solve the mathematical models defined in the second chapter, where the
reservoirpipe-valve-system is considered. The wave-speed adjustment (WSA)
scheme is preferred for the MOC. The numerical method is applied to the elastic
pipelines on onehand and to the viscoelastic pipelines on the other hand.
Numerical Modelling of Transient Cavitation
Page: 91-108 (18)
Author: Abdelaziz Ghodhbani*, Ezzeddine Haj Taïeb*, Mohsen Akrout* and Sami Elaoud*
DOI: 10.2174/9789815123760123010008
PDF Price: $15
Abstract
The modelling of transient cavitation is described in this chapter by
considering column separation modelling where FSI and gas release are taken into
account. As detailed for water hammer modelling, transient in straight pipeline is
caused by fast closure of shut-off valve. Both vaporous and gaseous cavitation are
considered in the numerical models.
Numerical Results for Elastic Pipelines
Page: 109-161 (53)
Author: Abdelaziz Ghodhbani*, Ezzeddine Haj Taïeb*, Mohsen Akrout* and Sami Elaoud*
DOI: 10.2174/9789815123760123010009
PDF Price: $15
Abstract
This chapter deals with the numerical results obtained from the simulation
of fluid transients in elastic pipes. The MOC with WSA scheme is used and the
numerical results are validated against experimental records. The comparison shows
good agreement between the two results which validate the earlier proposed models.
Numerical Results for Viscoelastic Pipelines
Page: 162-183 (22)
Author: Abdelaziz Ghodhbani*, Ezzeddine Haj Taïeb*, Mohsen Akrout* and Sami Elaoud*
DOI: 10.2174/9789815123760123010010
PDF Price: $15
Abstract
This chapter deals with the numerical results obtained from simulation of
fluid transients in viscoelastic pipes. For the non-cavitating flow case, the simulation
shows that the pressure fluctuations are rapidly attenuated, and the overall transient
pressure wave is delayed in time due to the retarded deformation of the pipe-wall. In
addition, the simulation of the cavitating flow gives reasonable results compared to
experimental data.
Review and Conclusions
Page: 184-187 (4)
Author: Abdelaziz Ghodhbani*, Ezzeddine Haj Taïeb*, Mohsen Akrout* and Sami Elaoud*
DOI: 10.2174/9789815123760123010011
PDF Price: $15
Appendices
Page: 188-204 (17)
Author: Abdelaziz Ghodhbani*, Ezzeddine Haj Taïeb*, Mohsen Akrout* and Sami Elaoud*
DOI: 10.2174/9789815123760123010012
PDF Price: $15
Bibliography
Page: 205-210 (6)
Author: Abdelaziz Ghodhbani*, Ezzeddine Haj Taïeb*, Mohsen Akrout* and Sami Elaoud*
DOI: 10.2174/9789815123760123010013
PDF Price: $15
Subject Index
Page: 211-215 (5)
Author: Abdelaziz Ghodhbani*, Ezzeddine Haj Taïeb*, Mohsen Akrout* and Sami Elaoud*
DOI: 10.2174/9789815123760123010014
PDF Price: $15
Introduction
This book presents numerical computational fluid dynamics (CFD) solutions for studying the effect of fluid-structure interaction (FSI) on evaluation of pressure waves in pipelines with cavitation. The authors develop a uniform one-dimensional model using coupled models. These models consider unsteady friction (UF), Poisson coupling, axial vibration (junction coupling), gas release and viscoelasticity. The authors consider two cases: elastic pipelines and viscoelastic (VE) pipelines. The book starts with a detailed literature review on the relevant methods for calculating transient fluid flow, followed by chapters that explain the mathematical development for calculations and the numerical steps for water hammer and transient cavitation. The concluding chapters present the results for the two pipeline cases. The book is presented in simple language intended for engineering students who want to understand CFD simulations for transient flow in pipelines. Equations are explained in simple steps for easy understanding, and concepts are illustrated with detailed diagrams. The information and the codes demonstrated in the book will equip readers with the knowledge to study hydraulic problems where transients are caused by pump starting, stopping and failure.