Libro de mecanica de fluidos

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ISBN (13) : 978-81-224-2558-1

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Preface to the Second Edition
This book Basic Fluid Mechanics is revised and enlarged by the addition offour chapters on Hydraulic Machinery and is now titled as Fluid Mechanics and Machinery. The authors hope this book will have a wider scope. This book will be suitable for the courses on Fluid Mechanics and Machinery of the various branches of study of Anna University and also other Indian universities and the Institution of Engineers (India). Professor Obert has observed in his famous treatise onThermodynamics that concepts are better understood by their repeated applications to real life situations. A firm conviction of this principle has prompted the author to arrange the text material in each chapter in the following order. In the first section after enunciating the basic concepts and laws, physical and mathematical models are developed leading to the formulation of relevant equationsfor the determination of outputs. Simple and direct numerical examples are included to illustrate the basic laws. More stress is on the model development as compared to numerical problems. A section titled “SOLVED PROBLEMS” comes next. In this section more involved derivations and numerical problems of practical interest are solved. The investigation of the effect of influencing parameters for thecomplete spectrum of values is attempted here. Problems involving complex situations are shown solved in this section. It will also illustrate the range of values that may be expected under different situations. Two important ideas are stressed in this section. These are (1) checking for dimensional homogeneity in the case of all equations derived before these equations can be used and (2) Thevalidation of numerical answers by cross checking. This concept of validation in professional practice is a must in all design situations. In the next section a large number of objective type questions with answers are given. These are very useful for understanding the basics and resolving misunderstandings. In the final section a large number of graded exercise problems involving simple to complexsituations, most of them with answers, are included. The material is divided into sixteen chapters. The first chapter deals in great detail with properties of fluids and their influence on the operation of various equipments. The next chapter discusses the determination of variation of pressure with depth in stationary and moving fluids. The third chapter deals with determination of forces onsurfaces in contact with stationary fluids. Chapter four deals with buoyant forces on immersed or floating bodies and the importance of metacentric height on stability. In chapter five basic fluid flow concepts and hydrodynamics are discussed. Energy equations and the variation of flow parameters along flow as well as pressure loss due to friction are dealt with in chapter six. (v)

(vi) In chapterseven flow in closed conduits including flow in pipe net work are discussed. Dimensional analysis and model testing and discussed in a detailed manner in chapters eight and nine. Boundary layer theory and determination of forces due to fluid flow on bodies are dealt with in chapter ten. In chapter eleven various flow measuring methods and instruments are described. Flow in open channels is...