Introduction to Fluid Mechanics: 5th Edition (Hardback) book cover

Introduction to Fluid Mechanics

5th Edition

By William S. Janna

CRC Press

749 pages | 584 B/W Illus.

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Introduction to Fluid Mechanics, Fifth Edition usesequations to model phenomena that we see and interact with every day. Placing emphasis on solved practical problems, this book introduces circumstances that are likely to occur in practice—reflecting real-life situations that involve fluids in motion. It examines the equations of motion for turbulent flow, the flow of a nonviscous or inviscid fluid, and laminar and turbulent boundary-layer flows. The new edition contains new sections on experimental methods in fluids, presents new and revised examples and chapter problems, and includes problems utilizing computer software and spreadsheets in each chapter.

The book begins with the fundamentals, addressing fluid statics and describing the forces present in fluids at rest. It examines the forces that are exerted on a body moving through a fluid, describes the effects that cause lift and drag forces to be exerted on immersed bodies, and examines the variables that are used to mathematically model open-channel flow. It discusses the behavior of fluids while they are flowing, covers the basic concepts of compressible flow (flowing gases), and explains the application of the basic concepts of incompressible flow in conduits. This book presents the control volume concept; the continuity, momentum, energy, and Bernoulli equations; and the Rayleigh, Buckingham pi, and inspection methods. It also provides friction factor equations for the Moody diagram, and includes correlations for coiled and internally finned tubes.

In addition, the author:

  • Concludes each chapter with a problems section
  • Groups the end-of-chapter problems together by topic
  • Arranges problems so that the easier ones are presented first

Introduction to Fluid Mechanics, Fifth Edition offers a basic analysis of fluid mechanics designed for a first course in fluids. This latest edition adds coverage of experimental methods in fluid mechanics, and contains new and updated examples that can aid in understanding and applying the equations of fluid mechanics to common, everyday problems.


"… presents the application of mathematics to engineering in a very simple manner so that students can understand and follow it very easily. … The many newly added problems can be used to introduce students to the concept of Design of Experiments that satisfies one of the current ABET Student Outcomes. Use of both units in the main text rather than assigning problems in both units is a great help to the students when they go out to the industries."

—Mahesh C. Aggarwal, Ph.D, Gannon University, Erie, Pennsylvania, USA

"Well-written and well-illustrated text. Clear derivations and copious applications of the theory are presented. Well selected homework problems and many worked-out examples. Welcome addition to the collection of quality introductory fluid mechanics books."

—Eugene F. Brown, Professor Emeritus, Virginia Polytechnic Institute and State University, Blacksburg, USA

"This book provides a very good and thorough introduction to fluid mechanics at the undergraduate level. This revision offers more examples for the students to learn from as well as numerous homework problems to assign students. The author has a writing style that presents subjects in a very understandable way. The chapter on dimensional analysis is one of the most thorough and clear I have ever read."

—Amy Lang, University of Alabama, Tuscaloosa, USA

"… I can confirm that the fifth edition of the book provides a very good introduction to fluid mechanics fundamentals."

—Thanos Megaritis, Brunel University London, UK

"The book is very well written, and it provides a very thorough mathematical analysis that can easily be followed by engineering students. Very clear discussions on practical aspects of modeling in fluid flow analysis using non-dimensional parameters are made. The book is highly recommended to engineering students as well as other professionals involved in design and analysis of hydraulic systems."

—A. K. Oskouie, Illinois Institute of Technology, Chicago, USA

Table of Contents

Fundamental Concepts

Dimensions and Units

Definition of a Fluid

Properties of Fluids

Liquids and Gases



Fluid Statics

Pressure and Pressure Measurement

Hydrostatic Forces on Submerged Plane Surfaces

Hydrostatic Forces on Submerged Curved Surfaces

Equilibrium of Accelerating Fluids

Forces on Submerged Bodies

Stability of Submerged and Floating Bodies


Internet Resources


Basic Equations of Fluid Mechanics

Kinematics of Flow

Control Volume Approach

Continuity Equation

Momentum Equation

Energy Equation

Bernoulli Equation


Internet Resources


Dimensional Analysis and Dynamic Similitude

Dimensional Homogeneity and Analysis

Dimensionless Ratios

Dimensional Analysis by Inspection



Internet Resources


Flow in Closed Conduits

Laminar and Turbulent Flows

Effect of Viscosity

Pipe Dimensions and Specifications

Equation of Motion

Friction Factor and Pipe Roughness

Simple Piping Systems

Minor Losses

Pipes in Parallel

Pumps and Piping Systems


Internet Resources


Flow over Immersed Bodies

Flow Past a Flat Plate

Flow Past Various Two-Dimensional Bodies

Flow Past Various Three-Dimensional Bodies

Applications to Ground Vehicles

Lift on Airfoils


Internet Resources


Flow in Open Channels

Types of Open-Channel Flows

Open-Channel Geometry Factors

Energy Considerations in Open-Channel Flows

Critical Flow Calculations

Equations for Uniform Open-Channel Flows

Hydraulically Optimum Cross Section

Nonuniform Open-Channel Flow


Internet Resources


Compressible Flow

Sonic Velocity and Mach Number

Stagnation Properties and Isentropic Flow

Flow through a Channel of Varying Area

Normal Shock Waves

Compressible Flow with Friction

Compressible Flow with Heat Transfer


Internet Resources



Equations of Turbomachinery

Axial-Flow Turbines

Axial-Flow Compressors, Pumps, and Fans

Radial-Flow Turbines

Radial-Flow Compressors and Pumps

Power-Absorbing versus Power-Producing Machines

Dimensional Analysis of Turbomachinery

Performance Characteristics of Centrifugal Pumps

Performance Characteristics of Hydraulic Turbines

Impulse Turbine (Pelton Turbine)



Measurements in Fluid Mechanics

Measurement of Viscosity

Measurement of Static and Stagnation Pressures

Measurement of Velocity

Measurement of Flow Rates in Closed Conduits

Measurements in Open-Channel Flows



The Navier-Stokes Equations

Equations of Motion

Applications to Laminar Flow

Graphical Solution Methods for Unsteady Laminar Flow Problems

Introduction to Turbulent Flow



Inviscid Flow

Equations of Two-Dimensional Inviscid Flows

Stream Function and Velocity Potential

Irrotational Flow

Laplace’s Equation and Various Flow Fields

Combined Flows and Superpositions

Inviscid Flow Past an Airfoil



Boundary-Layer Flow

Laminar and Turbulent Boundary-Layer Flow

Equations of Motion for the Boundary Layer

Laminar Boundary-Layer Flow over a Flat Plate

Momentum Integral Equation

Momentum Integral Method for Laminar Flow over a Flat Plate

Momentum Integral Method for Turbulent Flow over a Flat Plate

Laminar and Turbulent Boundary-Layer Flow over a Flat Plate



Conversion Factors and Properties of Substances

Geometric Elements of Plane Areas

Pipe and Tube Specifications

Compressible Flow Tables



About the Author

William S. Janna received his BSME, MSME, and Ph.D from the University of Toledo, Ohio. He joined the mechanical engineering faculty of the University of New Orleans in 1976, where he became department chair, and served in that position for four years. Subsequently, he joined the University of Memphis in 1987 as chair of the Department of Mechanical Engineering. He also served as associate dean for graduate studies and research in the Herff College of Engineering. He is the author of three textbooks and teaches short courses for the American Society of Mechanical Engineers (ASME).

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