friction factor


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friction factor

[′frik·shən ‚fak·tər]
(fluid mechanics)
Any of several dimensionless numbers used in studying fluid friction in pipes, equal to the Fanning friction factor times some dimensionless constant.
References in periodicals archive ?
Pressure drop is calculated by friction loss according to friction factor correlations in the pipe flow and momentum change due to cross-section area variation.
The obtained values of roughness were used in the equation of Swamee (1993) to calculate the friction factor (f) (Eq.
2]/water demonstrating that the increase of Nusselt number and friction factor depend on increasing volume fraction.
The researchers associated the friction factor in wells with the slippage and tried to get the curve which is consistent with the friction factor of single phase flow.
Plastic strain factor at failure and contact friction factor must be obtained from stone impact test to improve accuracy of CAE.
Recorded loads reached maximums of approximately 10,000 pounds on the northward run, and 21,000 pounds southward, with a calculated friction factor of 0.
field investigation includes, but is not limited to: provide a topographical survey of the manholes along a seven (7) mile segment of the aqueduct with top of casting and bottom of pipe elevations at a minimum; provide a visual survey of the inside of the aqueduct along the seven mile segment; document all visible damage and structural deficiencies with photo and video records; document the condition of the steel, rivets, joints, connections, valve chambers and manholes at a minimum; and, perform any other testing or inspections that will aid in the determination of the friction factor of the pipeline and its capacity for pressurization.
phi]] and is called the friction factor brittle index, which characterizes the maximum attenuation margin of the friction factor in the gradual failure process of the soil.