head loss

head loss

[′hed ‚lȯs]
(fluid mechanics)
The drop in the sum of pressure head, velocity head, and potential head between two points along the path of a flowing fluid, due to causes such as fluid friction.

pressure drop

The decrease in fluid pressure between two ends of a duct or pipeline, between two points in a system, across valves and fittings, etc., due to frictional losses; in a water-piping system a drop in fluid pressure also occurs between two points as a result of the difference in elevation between the two points.
References in periodicals archive ?
Upflow filtration has the advantage that the heavier particles are removed first at the bottom of the filter (1), and the system is able to store large amounts of solids at a very low head loss (2).
The total dynamic head is the vertical lift of water, measured in feet, from the level of the water source up to a tank or higher discharge point, plus the head loss caused by friction in the piping and pipe fittings between the two points.
1, adapted from Souza & Botrel (2004), is valid for microtubes operating in the laminar flow regime and contains terms that allow to quantify the head loss distributed along the microtube, the local loss resulting from the narrowing of the flow lines at the microtube inlet hole, the kinetic head on the discharge end of the microtube and the vertical distance between the microtube discharge hole and the lateral line.
Secondly, the UV system needed to achieve the required disinfection standard while maintaining less than 20 inches of head loss so that the hydraulic profile would not be disrupted.
I had a head loss in the game and it wasn't going well, so I lashed out at someone.
Due to the use of shut off solenoid valve in the fuel injection line there will be a loss in pressure or a head loss, this loss can be calculated as follows, [H.
Quarter-Turn Valves: Head Loss, Torque, and Cavitation Analysis, 3rd Edition
Characteristic curves were plotted between flow rates (Q) versus pressure head loss (HL).
The hydraulic modeling software uses several equations to calculate the head loss in a pipe.
However, a small head increase in the container might be counterbalanced by the head loss in bends.
Let begin with estimation of head loss coefficient [xi].