Fluid Mechanics and Hydraulic Machines

CHAPTER 3

Ideal Fluid Flow

OUTLINE

• Introduction
• Basic Flows
• Superimposition of Basic Flows
• Integration of Euler’s Equation
• Modified Bernoulli Equation

3.1 Introduction

In the initial period of the development of the subject, assumption of an inviscid and incompressible fluids were made because of less mathematical complications. An inviscid fluid is the one that has no viscosity; this is an ideal assumption because all fluids have some viscosity, however small it may be. On the other hand, incompressibility eliminates the density as one of the variables, thus reducing the number of unknowns. Such fluid is called an ideal fluid. In such case, there will be no shear stress and only the pressure force will act which is normal to the surface, ...