### One-Dimensional Transient Flow in Pipelines Modelling and Simulation

eBook: US \$49 Special Offer (PDF + Printed Copy): US \$83
Printed Copy: US \$58
ISBN: 978-981-5123-77-7 (Print)
ISBN: 978-981-5123-76-0 (Online)
Year of Publication: 2023
DOI: 10.2174/97898151237601230101

#### 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.

Audience: Engineering students and instructors studying hydraulics and computational fluid dynamics.

# Foreword

The authors have written this book based on their research in computational fluid mechanics (CFD), specifically on transient fluids. The mathematical formulation of the physical phenomena occurring in fluid pipes, the use of the method of characteristics (MOC) as a tool to solve the governing equations of the numerical models and the coding strategy of these numerical models into a CFD tool are three difficult but essential steps for any fluid mechanics’ research study. These steps are well presented and detailed in this book.

The book is written in simple English and the Mathematical and Numerical formulations of the physical problems are reasonably explained. The numerical code algorithms are detailed in appendices. In brief, the book provides a simple one-dimensional method to predict what happens exactly in a fulfilled straight pipe when water hammer and cavitation phenomena occur therein. Finally, this book will surely help readers to develop their modelling skills in fluid mechanics.

Hab. Eng. Ridha ENNETTA
Mechanical Engineering
University of Gabes
Tunisia
Africa