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[′presh·ər ‚hed]
(fluid mechanics)
The height of a column of fluid necessary to develop a specific pressure.
The pressure of water at a given point in a pipe arising from the pressure in it.

The static pressure of fluid expressed in terms of the height of a column of the fluid which the pressure could support.
References in periodicals archive ?
2016b), the highly negative pressure head used at the beginning of the experiment restricted its use to soil samples that had good contact between the nylon mesh of the sorptivimeter and the corresponding mesh located at the bottom of the soil cylinder (e.
The idea of the system design also includes emitter discharge variations due to change in pressure head, which depends upon variability in manufacturing, change in temperature of water and choking in flow.
3]) at soil water pressure head P and a, b, c, d, and e are regression coefficients.
The outflow and pressure head at every gate along the pipeline of gated pipes irrigation system [6 inch diameter, 12 and 6 m length with gates (circle shape with 34 mm diameter) at 0.
This in turn led me to think of an inverted system, which reduced the pressure head at each stage instead of increasing it.
The equation contains two unknown functions, the water content and the pressure head, and one parameter--the hydraulic conductivity.
The second column shows the actual operating results when the resistance of the three-way valve is small relative to the primary system pressure head.
h] is the water content at pressure head h, and a, b, c, d, and x are the regression coefficients.
The gains, especially in terms of Pressure Head (almost + 50%) and Flow Rate (Over + 20%) are significant enough to make Invertor Motors a viable economic option.
This forces the pressure head to relieve the set on the packer and the actuator flange to pull the slips off of the slip bowl ramp, releasing the module.
A trip to Hawaii brought out the kind of defensive pressure head coach Ken Sugarman pleads for on a regular basis.
Surface scorch caused by friction acting in conventional pressure head dies simply does not happen with the SRRD.

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