P u2

which is called Bernoulli's equation, is useful. Strictly speaking, this equation applies for inviscid, incompressible, steady flow along a streamline. However, even in pipe flow where the flow is viscous, the equation can be applied because of the confined nature of the flow. That is, the flow is forced to behave in a streamlined manner. Note that the first law equation (1.8) yields Bernoulli's equation if the friction drop exactly equals the pump work.

I.4.3 Fluid-Handling Equipment

For industrial processes, another prime application of fluid dynamics lies in fluid-handling equipment.

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