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  2. Hydrostatic head - Wikipedia

    en.wikipedia.org/wiki/Hydrostatic_head

    Hydrostatic head is also used as a measure of the waterproofing of a fabric, commonly in clothing and equipment used for outdoor recreation.It is measured as a length (typically millimetres), representing the maximum height of a vertical column of water that could be placed on top of the fabric before water started seeping through the weave.

  3. Hydraulic head - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_head

    In fluid dynamics, head is a concept that relates the energy in an incompressible fluid to the height of an equivalent static column of that fluid. From Bernoulli's principle, the total energy at a given point in a fluid is the kinetic energy associated with the speed of flow of the fluid, plus energy from static pressure in the fluid, plus energy from the height of the fluid relative to an ...

  4. Pressure head - Wikipedia

    en.wikipedia.org/wiki/Pressure_head

    Pressure head is a component of hydraulic head, in which it is combined with elevation head. When considering dynamic (flowing) systems, there is a third term needed: velocity head. Thus, the three terms of velocity head, elevation head, and pressure head appear in the head equation derived from the Bernoulli equation for incompressible fluids:

  5. Total dynamic head - Wikipedia

    en.wikipedia.org/wiki/Total_dynamic_head

    In fluid dynamics, total dynamic head (TDH) is the work to be done by a pump, per unit weight, per unit volume of fluid.TDH is the total amount of system pressure, measured in feet, where water can flow through a system before gravity takes over, and is essential for pump specification.

  6. Dynamic pressure - Wikipedia

    en.wikipedia.org/wiki/Dynamic_pressure

    The three terms are used to define the state of a closed system of an incompressible, constant-density fluid. When the dynamic pressure is divided by the product of fluid density and acceleration due to gravity, g, the result is called velocity head, which is used in head equations like the one used for pressure head and hydraulic head.

  7. Affinity laws - Wikipedia

    en.wikipedia.org/wiki/Affinity_laws

    The affinity laws (also known as the "Fan Laws" or "Pump Laws") for pumps/fans are used in hydraulics, hydronics and/or HVAC to express the relationship between variables involved in pump or fan performance (such as head, volumetric flow rate, shaft speed) and power. They apply to pumps, fans, and hydraulic turbines. In these rotary implements ...

  8. Oil cooling - Wikipedia

    en.wikipedia.org/wiki/Oil_cooling

    Oil cooling is the use of engine oil as a coolant, typically to remove surplus heat from an internal combustion engine. The hot engine transfers heat to the oil which then usually passes through a heat-exchanger, typically a type of radiator known as an oil cooler. The cooled oil flows back into the hot object to cool it continuously.

  9. Fluid conductance - Wikipedia

    en.wikipedia.org/wiki/Fluid_conductance

    The volumetric discharge through the stream-bed can be calculated if the difference in hydraulic head is known: = where is the volumetric discharge through the stream-bed ([L 3 T −1]; m 3 s −1 or ft 3 day −1) is the hydraulic head of the river (elevation stage)

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