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Even though Bernoulli's equation is only correct for hypothetical nonviscous
fluids, it nevertheless has wide applicability. Many examples were discussed
in class (with demos); here is a brief summary with references:

The Pitot tube is used to measure air speed. See Tritton, page
420.

The Venturi effect arises from the combination of the continuity
equation and the Bernoulli equation when an incompressible fluid flows
through a constriction in a pipe: the speed must be higher and the pressure
drops. See Tipler, page 350, and Tritton, page 121, for
applications.

Atomizers and similar devices are described in Tipler, page 351,
and How Things Work, page 174.
 Hurricanes and tornadoes have strong winds that can literally
lift a roof off, by the Bernoulli effect.

Flapping flags and the KelvinHelmholtz instability are treated
by Tritton on page 262.
It is important to realize that it is not enough to find a solution of
the hydrodynamic equations: one must also check that the solution is stable.
Vittorio Celli
Wed Sep 10 01:02:02 EDT 1997