In this and the next two chapters, we take three geometrically simple flow configurations and have a look at the principal flow phenomena. These will provide a more specific introduction than the last chapter to the character of fluid dynamics. We consider these examples now, before starting on the formal development of the subject in Chapter 5; we can then approach the setting up of the equations of motion with an idea of the types of phenomena that one hopes to understand through these equations. Although these chapters are primarily phenomenological, the present chapter will also be used to introduce some simple theoretical ideas.
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