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hydraulic friction

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  • Hydraulic head — is a specific measurement of water pressure or total energy per unit weight above a geodetic datum. It is usually measured as a water surface elevation, expressed in units of length, but represents the energy at the entrance (or bottom) of a… …   Wikipedia

  • Hydraulic analogy — The electronic–hydraulic analogy (derisively referred to as the drain pipe theory by Oliver Heaviside) is the most widely used analogy for electron fluid in a metal conductor. Since electric current is invisible and the processes at play in… …   Wikipedia

  • Hydraulic jump — A hydraulic jump is a phenomenon in the science of hydraulics which is frequently observed in open channel flow such as rivers and spillways. When liquid at high velocity discharges into a zone of lower velocity, a rather abrupt rise (a step or… …   Wikipedia

  • Hydraulic brake — The hydraulic brake is an arrangement of braking mechanism which uses brake fluid, typically containing ethylene glycol, to transfer pressure from the controlling unit, which is usually near the operator of the vehicle, to the actual brake… …   Wikipedia

  • friction head — noun : the head (sense 14a) lost by flowing water as a result of friction between the moving water and the walls of its conduit plus intermolecular disturbances * * * (in a hydraulic system) the part of a head of water or of another liquid that… …   Useful english dictionary

  • friction head — (in a hydraulic system) the part of a head of water or of another liquid that represents the energy that the system dissipates through friction with the sides of conduits or channels and through heating from turbulent flow. [1885 90] * * * …   Universalium

  • hydraulic radius —   stream efficiency measured by dividing cross sectional area of a stream by the wetted perimeter. A higher ratio indicates greater efficiency as area will be greater compared to wetted perimeter and it is the latter which reduces efficiency… …   Geography glossary

  • Darcy friction factor formulae — In fluid dynamics, the Darcy friction factor formulae are equations based on experimental data and theory for the Darcy friction factor. The Darcy friction factor is a dimensionless quantity used in the Darcy–Weisbach equation, for the… …   Wikipedia

  • Groundwater energy balance — The groundwater energy balance is the energy balance of a groundwater body in terms of incoming hydraulic energy associated with groundwater inflow into the body, energy associated with the outflow, energy conversion into heat due to friction of… …   Wikipedia

  • Auto Union racing car — Auto Union Type C The Auto Union Grand Prix racing cars types A to D, were developed and built by a specialist racing department of Horch works in Zwickau between 1933 and 1939. Between 1935 and 1937 Auto Union cars won 25 races, driven by Ernst… …   Wikipedia

  • Vacuum sewer — Vacuum sewers were first installed in Europe in 1882 but until the last 30 years it had been relegated to a niche market. The first who has applied the negative pressure drainage (so called vacuum sewerage) was the Dutch engineer Liernur in the… …   Wikipedia

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