Results 251 to 260 of about 506,862 (302)

Friction Factor under Oscillatory Waves

Journal of the Waterways, Harbors and Coastal Engineering Division, 1975
Tests were performed in an oscillating water tunnel to determine the relationships between wave parameters and resulting bottom friction and shear stresses. The test results are presented in Stanton-type wave friction factor diagrams and results are compared with existing semitheoretical expressions. Transitions between flow regimes are also defined.
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Study on the Friction Factor and High-Temperature Friction Resistance of Semi-Metal Frictional Materials

Key Engineering Materials, 2016
The orthogonal experimental study is carried out to study the Incorporation of different proportion of functional components and the effect on tribological performance among semi-metallic friction materials. A test is conducted for each sample on XXD-MSM constant speed tester in accordance with Brake Linings for Automobiles (GB5763-2008).
Yue Wang, Yuan Kang Zhou, Hua Wei Nie
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Field Assessment of Friction Head Loss and Friction Correction Factor Equations

Journal of Irrigation and Drainage Engineering, 2012
Friction head loss equations and friction correction factors were evaluated and compared to field observations collected from thirty center pivots with laterals made of PVCs. The friction head loss equations include Darcy-Weisbach (D-W), Hazen-Williams (H-W), and Scobey, in addition to a proposed equation valid for smooth and rough pipe types and for ...
A. A. Alazba, M. A. Mattar, M. N. ElNesr, M. T. Amin   +3 more
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Friction Factor of Meandering Flows

Journal of Hydraulic Engineering, 1999
An expression for the friction factor of rough turbulent meandering flows is suggested: flow cross section is rectangular, the plan shape of the meandering channel is sine-generated. This expression gives the value of the friction factor as a function of position (which is determined by, among other factors, the local channel curvature) and channel ...
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Friction factors in pulsed turbulent flow

The Canadian Journal of Chemical Engineering, 1971
AbstractAn apparatus for investigating pulsed turbulent liquid flow in a 2 in. diameter, 80 ft. pipeline is described. The pulsation unit was powered by compressed air with a consumption of up to 2.7 std. cu.ft./min. at 35 lb/in2 gauge. The pressure drop for water flowing at mean velocities of 7.66 to 12.28 ft./sec.
M. H. I. Baird, G. F. Round, J. N. Cardenas   +2 more
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Ripple Concentration and Friction Factor

Journal of the Hydraulics Division, 1970
Flow over ripples in alluvial channels is essentially the same as the flow over rigid roughness elements, the main difference lying only in the shapes of the ripples and roughness elements. The total friction factor is the summation of grain-roughness friction factor and form-roughness friction factor.
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Friction Factors for Pipe Flow

Journal of Fluids Engineering, 1944
Abstract The object of this paper is to furnish the engineer with a simple means of estimating the friction factors to be used in computing the loss of head in clean new pipes and in closed conduits running full with steady flow. The modern developments in the application of theoretical hydrodynamics to the fluid-friction problem are ...
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A unified friction factor formulation: Bridging laminar and turbulent friction factor with critical points analysis

Physics of Fluids
The friction factor is widely recognized as a pivotal parameter in the analysis of fluid–boundary interactions; however, a comprehensive grasp of friction mechanics remains elusive. This investigation revisits measurements from the benchmark Nikuradse measurements, furnishing indirect evidence of two critical points in pipe turbulence.
Wei-Jie Wang, Shuolin Li, Wei Huang, Zhen Han, Wei-Hao Wang   +4 more
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Simple Harmonic Motion experiences BAR Friction 7% Factor and 57% Ground Friction Factor

Simple Harmonic Motion experiences ATM Friction 7 % Factor and 57% Ground Friction Factor.
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Relationship between frictional coefficient and frictional factor in asymmetrical sheet rolling

Journal of Materials Processing Technology, 1999
Abstract Generally, two kinds of surface frictional states can be used, i.e. Coulomb friction ( τ = μp ) and constant shear friction ( τ = mk ) in analyzing asymmetrical sheet rolling. The relationship between frictional coefficient and frictional factor in asymmetrical sheet rolling is worthy of investigation.
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