Dictionary Meaning and Definition on 'Hydraulics'
n : study of the mechanics of fluids [syn: fluid mechanics]
- Hydraulics \Hy*drau"lics\, n. [Cf. F. hydraulique.]
That branch of science, or of engineering, which treats of
fluids in motion, especially of water, its action in rivers
and canals, the works and machinery for conducting or raising
it, its use as a prime mover, and the like.
Note: As a science, hydraulics includes hydrodynamics, or the
principles of mechanics applicable to the motion of
water; as a branch of engineering, it consists in the
practical application of the mechanics of fluids to the
control and management of water with reference to the
wants of man, including canals, waterworks, hydraulic
machines, pumps, water wheels, etc. Some writers treat
hydraulics and hydrostatics as subdivisions of
- Mechanics \Me*chan"ics\, n. [Cf. F. m['e]canique.]
That science, or branch of applied mathematics, which treats
of the action of forces on bodies.
Note: That part of mechanics which considers the action of
forces in producing rest or equilibrium is called
statics; that which relates to such action in
producing motion is called dynamics. The term
mechanics includes the action of forces on all bodies,
whether solid, liquid, or gaseous. It is sometimes,
however, and formerly was often, used distinctively of
solid bodies only: The mechanics of liquid bodies is
called also hydrostatics, or hydrodynamics,
according as the laws of rest or of motion are
considered. The mechanics of gaseous bodies is called
also pneumatics. The mechanics of fluids in motion,
with special reference to the methods of obtaining from
them useful results, constitutes hydraulics.
Animal mechanics (Physiol.), that portion of physiology
which has for its object the investigation of the laws of
equilibrium and motion in the animal body. The most
important mechanical principle is that of the lever, the
bones forming the arms of the levers, the contractile
muscles the power, the joints the fulcra or points of
support, while the weight of the body or of the individual
limbs constitutes the weight or resistance.
Wikipedia Meaning and Definition on 'Hydraulics'
Hydraulics is a topic in applied science and engineering dealing with the mechanical properties of liquids. Fluid mechanics provides the theoretical foundation for hydraulics, which focuses on the engineering uses of fluid properties. In fluid power, hydraulics is used for the generation, control, and transmission of power by the use of pressurized liquids. Hydraulic topics range through most science and engineering disciplines, and cover concepts such as pipe flow, dam design, fluidics and fluid control circuitry, pumps, turbines, hydropower, computational fluid dynamics, flow measurement, river channel behavior and erosion.
Free surface hydraulics is the branch of hydraulics dealing with free surface flow, such as occurring in rivers, canals, lakes, estuaries and seas. Its sub-field open channel flow studies the flow in open channels.[See more about Hydraulics at Dictionary 3.0 Encyclopedia]