Investigation on the effects of entrained air in pipelines PDF Download

Author: Oscar Pozos Estrada
Publisher:
ISBN: 9783933761620
Category :
Languages : de
Pages : 176

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Author: Manuela Escarameia
Publisher:
ISBN: 9781898485117
Category : Fluid dynamics
Languages : en
Pages : 52

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Author: Jeremy Eden Smith Boswell
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: Abdelaziz Ghodhbani
Publisher: Bentham Science Publishers
ISBN: 9815123777
Category : Technology & Engineering
Languages : en
Pages : 236

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Book Description
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.

Author: Nahm Ho Lee
Publisher:
ISBN:
Category : Hydraulic transients
Languages : en
Pages :

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Analytical and experimental laboratory studies were conducted for rapid pressurizing of entrapped gas at the end of a horizontal liquid pipeline. In this paper analytical and experimental model study are presented for pressurizing entrapped gas pocket at the end of a liquid column in a horizontal pipeline. Analytical models are considered such as (1) acoustic effect of both liquid and gas side, (2) variation of liquid length, and (3) thermal damping process. Closed form of solutions were derived for a lumped liquid and lumped gas model if pipeline is a horizontal. Experiments were conducted to verify the analytical models. Comparison of analytical and experimental model results were presented. Analytical model was developed to define the physics behind the gas venting case. Experiments were conducted for a range of orifice sizes from 1/16 to 1/2 of the pipe diameter with reservoir pressure two, three and four times of ambient pressure for five different pipe configurations. Experimental results confirm the assumption of modified entrapped air model is correct.

Author: C. A. Brebbia
Publisher: WIT Press
ISBN: 1845647343
Category : Science
Languages : en
Pages : 557

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Multiphase flows are found in all areas of technology, at all length scales and flow regimes and can involve compressible or incompressible linear or nonlinear, fluids. However, although they are ubiquitous, multiphase flows continue to be one of the most challenging areas of computational mechanics, with numerous problems as yet unsolved. Advanced computational and experimental methods are often required to solve the equations that describe such complex problems. The many challenges that must be faced in solving them include modelling nonlinear fluids, modelling and tracking interfaces, dealing with multiple length scales, characterising phase structures, and treating drop break-up and coalescence. It is important to validate models, which calls for the use of expensive and difficult experimental techniques.This book presents contributions on the latest research in the techniques for solving multiphase flow problems, presented at the seventh in a biennial series of conferences on the subject that began in 2001. Featured topics include: Flow in porous media; Turbulent flow; Multiphase flow simulation; Image processing; Heat transfer; Atomization; Interface behaviour; Oil and gas applications; Experimental measurements; Energy applications; Biological flows; Micro and macro fluids; Compressible flows.

Author: John Junke Guo
Publisher: World Scientific
ISBN: 981448797X
Category : Technology
Languages : en
Pages : 1152

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This book presents a wide range of recent advances in hydraulics and water engineering. It contains four sections: hydraulics and open channel flow; hydrology, water resources management and hydroinformatics; maritime hydraulics; ecohydraulics and water quality management. World authorities such as Mike Abbot, I Nezu, A J Metha, M Garcia and P Y Julien have contributed to the book.

Author:
Publisher: American Water Works Association
ISBN: 1583211527
Category : Technology & Engineering
Languages : en
Pages : 52

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Book Description
Operators, technicians, and engineers will find the information in this manual useful for gaining a basic understanding of the use and application of air valves. A valuable guide for selecting, sizing, locating, and installing air valves in water applications, M51 provides information on air valve types listed in AWWA Standard C512, latest edition, including the following: air-release valve; air/vacuum valve; and combination air valve.

Author: Metcalf & Eddy
Publisher: McGraw-Hill Companies
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 456

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"1 Wastewater Collection and Pumping An Overview 2 Review of Applied Hydraulics 3 Wastewater Flows and Measurements 4 Design of Sewers 5 Sewer Appurtenances 6 Infiltration/Inflow 7 Occurrence 8 Effect, and Control of the Biological Transformations in Sewers 9 Pumps and Pump Systems 10 Pumping Stations." -- Publisher.

Author:
Publisher:
ISBN:
Category : Mechanics, Applied
Languages : en
Pages : 630

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