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Real Fluids

We have so far considered ideal fluids, which are not only incompressible but also nonviscous. In the absence of viscosity, mechanical energy is conserved, which is the essence of Bernoulli's equation. However, to understand one of the more important properties of a fluid, its ability to exert drag forces on objects, we must go beyond the nonviscous approximation and incorporate the effects of viscosity into our description of fluid flow.

Notes by A. Dorsey, revised by V. Celli, Univ. of Virginia
Sun Sep 28 22:13:11 EDT 1997