friction head

friction head

[′frik·shən ‚hed]
(fluid mechanics)
The head lost by the flow in a stream or conduit due to frictional disturbances set up by the moving fluid and its containing conduit and by intermolecular friction.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

friction head

In a piping system, the pressure drop expended in overcoming frictional resistance to flow.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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References in periodicals archive ?
The proper design of drip irrigation laterals comprehends emitter discharge variations, change of flow stream lines due to emitter's barb protrusion, change of hydraulic head due to elevation, friction head losses in the laterals to provide uniform water application.
Friction head is [A.sub.2][O.sub.3] ceramic, the load is 25 N, the relative sliding speed is 25mm/s, and the friction time is 30 min.
For the thermosiphon solar water heaters, the flow rate of the circulating water is conventionally calculated by equating the pressure head and the friction head. Pressure head is caused by density gradients in the loop, and the friction head is caused by friction in the plumbing arrangement.
The Diamondback[R] tulip is tapered with a friction head, which makes the tulip not floppy.
First, we calculate the friction head loss in the eighth floor horizontal run and the two risers connecting the seventh and eighth floors.
In the case where there are long runs of condenser water piping between the condenser and the cooling tower, with a correspondingly large flow friction head loss, a VFD may indeed provide energy savings by reducing flow and head loss at part load and/or part lift.
For wildlife and shots of moving people, particularly in windy weather, a heavier tripod with a fluid head assures the best results, because the weight of the tripod alone, coupled with solid legs, minimizes the effects of wind and hand movement, and the fluid head allows you to pan and tilt the camera smoothly without the jumps and jerks you'll get with a cheap friction head. One of my large, professional tripods cost $3,500.
He enjoys an Indian tonic friction head massage and an eyebrow massage.
Liam Finnegan, owner of the Waldorf Adare, combines traditional hot towel shaves with Indian tonic friction head massages.
The result is that friction head is added to the system and this increases the electric power required.
The Diamond Head long-life coating is a carbon substance that creates a smooth and ultra-hard, Itra-low friction head surface.
TPIPE calculates the Reynolds number, flow velocity, friction factor, friction head, and pressure drop for any flow condition.