Chapter 3 Fundamentals of Inviscid, incompressible Flow Theoretical fluid dynamics, being a difficult subject, is for convenience, commonly divided into two branches, one treating frictionless or perfect fluids, the other treating of viscous or imperfect fluids. The frictionles fluid has no existence in nature, but is hypothesized by mathematicians in order to facilitate the investigation of important laws and principles that may be approximately true of viscous or natural fluids

Chapter 1 Aerodynamics: Some Introductory Thoughts The term \aerodynamics\is generally used for problems arising from flight and other topics involving the flow of air. Ludwig Prandtl, 1949 Aerodynamics: The dynamics of gases, especially of atmospheric interactions with moving objects. The American Heritage Dictionary of English Language, 1969

Chapter 1 Introduction 1.1 Preliminary Remarks When you think about it, almost everything on this planet either is a fluid or moves within or near a fluid. -Frank M. White What is a fluid?

Properties of Pressure Vertical to the surface and point into it. At any point, pressure is independent of orientation

When is a flow compressible? compressible flow differs from an incompressible one in that significant change happens in the density

随着现代科学技术的飞速发展,人们对 材科的要求越来越高。 在结构材料方面,不但要求强度高,还 要求其重量要轻,尤其是在航空航天领域。 金属基复合材料正是为了满足上述要求 而诞生的

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《流体动力学》（英文版）lecture 9

《流体动力学》（英文版）lecture 7