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About this book

This book provides design engineers using gas-liquid two-phase flow in different industrial applications the necessary fundamental understanding of the two-phase flow variables. Two-phase flow literature reports a plethora of correlations for determination of flow patterns, void fraction, two- phase pressure drop and non-boiling heat transfer correlations. However, the validity of a majority of these correlations is restricted over a narrow range of two -phase flow conditions. Consequently, it is quite a challenging task for the end user to select an appropriate correlation/model for the type of two-phase flow under consideration. Selection of a correct correlation also requires some fundamental understanding of the two-phase flow physics and the underlying principles/assumptions/limitations associated with these correlations. Thus, it is of significant interest for a design engineer to have knowledge of the flow patterns and their transitions and their influence on two-phase flow variables. To address some of these issues and facilitate selection of appropriate two-phase flow models, this volume presents a succinct review of the flow patterns, void fraction, pressure drop and non-boiling heat transfer phenomenon and recommend some of the well scrutinized modeling techniques.

Table of Contents

Frontmatter

Chapter 1. Introduction

Abstract
This chapter provides a brief background on two-phase flow, the need for two-phase flow study in inclined systems, and basic definitions of interest in two-phase flow.
Afshin J. Ghajar

Chapter 2. Two-Phase Flow Experimental Setup for Inclined Systems

Abstract
This chapter provides the details of a versatile experimental setup used for flow visualization and collection of pertinent two-phase flow data (void fraction, pressure drop, and non-boiling heat transfer coefficient) in inclined systems.
Afshin J. Ghajar

Chapter 3. Flow Patterns, Flow Pattern Maps, and Flow Pattern Transition Models

Abstract
This chapter provides some of the flow visualization results of the experimental setup discussed in Chapter 2, a succinct review of the flow patterns, flow pattern maps, and flow pattern transition models.
Afshin J. Ghajar

Chapter 4. Void Fraction

Abstract
This chapter first presents parametric analysis of the void fraction and then provides a brief review of some of the modeling techniques for determination of the void fraction and recommendation of well-scrutinized void fraction correlations, followed by an illustrative example.
Afshin J. Ghajar

Chapter 5. Pressure Drop

Abstract
This chapter first presents parametric analysis of the pressure drop and then provides a brief review of the modeling techniques for determination of the pressure drop and recommendation of top-performing pressure drop correlations, followed by an illustrative example.
Afshin J. Ghajar

Chapter 6. Entrainment

Abstract
This chapter briefly presents the entrainment mechanisms and the different correlations used to predict liquid entrainment fraction in gas–liquid annular flow. An illustrative example for calculation of liquid entrainment fraction is also provided.
Afshin J. Ghajar

Chapter 7. Non-Boiling Two-Phase Heat Transfer

Abstract
This chapter first presents parametric analysis of the two-phase non-boiling heat transfer coefficient and then provides some recent correlations for prediction of heat transfer coefficient and the application of those correlations to a practical problem.
Afshin J. Ghajar

Backmatter

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