# Bed Topography Effect on Flow in a Meander

*Stabilized bed topography in a meandering channel with fixed walls and movable bed was measured at various width-depth ratios and Froude numbers. Velocity and bed-shear distributions were...*

Flow in Conduits with Low Roughness Concentration

*Transition functions which relate the friction factor and the relative roughness to the Reynolds number are obtained by utilizing the basic laws for turbulent flow in conduits plus the...*

Sediment Sampling Efficiency of Slots

*The sediment sampling efficiency of two-dimensional slots in open channel was studied. Eight fractions of sand and gravel were used ranging in size from 0.2 mm to 4.5 mm. A universal relation...*

Scaling Methods for Surface Aerators

*The scaling laws for relating the performance of different-sized surface aerators are reviewed. It is concluded that complete dynamic similarity, stipulated by simultaneous equality of...*

Surface Tension in Froude Models

*A criterion for avoiding surface tension effects in Froude models is obtained analytically for uniform flows. Experiments show that surface tension does not, in practice, limit the scale...*

Resistance Coefficient of Uniform-Sand Roughness

*The Weisbach resistance coefficient,*f , is a boundary-drag coefficient. In the gross sense over a finite length of boundary, the coefficient...

Development of Roll-Wave Trains in Open Channels

*The maximum depth at wave crest, minimum depth at wave trough, wave period and wave velocity of spontaneously developed roll-wave trains were measured in a laboratory channel. Channel...*

Nondimensional Gradually-Varied Flow Profiles

*Chezy's and Manning's flow formulas are used to formulate flow equations for gradually-varied flow in wide rectangular channels. The flow equations are normalized...*

Pressure Fluctuations on Submerged Sluice Gate

*Investigations were carried out to determine the functional relationship between the Froude number and the magnitude, distribution and frequency of pressure fluctuations on the downstream...*

Local Scour Around Bridge Piers

*Local scour caused by the horseshoe vortex system which forms at the base of the piers is considered. Piers which induce a pressure field strong enough to cause the formulation of the...*

Horizontal Surface Discharge of Warm Water Jets

*Large thermal-electric power plants use an average of 1.5 cfs per Mw cooling water, with a temperature rise of about 10○ F to 20○ F, and flow velocities with a mean of about 7 fps; the...*

Effects of Viscous Sublayer on Dispersion

*The dimensionless dispersion coefficient for a pollutant ejected into a uniform turbulent flow is shown to depend on the characteristics of the viscous sublayers; calculations are carried...*

Turbulent Flow of Non-Newtonian Suspensions in Pipes

*A physical model of the turbulent now of purely viscous, non-Newtonian fluids in smooth pipes has been postulated. According to this model the chaotic motions of particles increase the...*

Validity of Stokes Theory for Accelerating Spheres

*Measured displacement-time relations for spheres gravitationally accelerating from rest through viscous fluids are compared with the displacement-time relations predicted by the Stokes...*

Boundary-Layer Development at Curved Conduit Entrances

*To gain a better understanding of the energy reduction in a conduit inlet shaped according to potential-flow theory, boundary-layer measurements were made in a nonrecirculating air duct...*

Profile of the Hydraulic Jump

*A generalized water-surface profile is presented for hydraulic jumps formed in smooth and horizontal rectangular channels. The vertical scale is equal to 0.75 times the height of the jump,...*

Laminar Flow in Finitely Wide Rectangular Channels

*Experimental investigations in rectangular channels with width-to-depth ratios ranging from 2.74:1 to 100:1 confirm the Boussinesq solution of Poisson's equation for two-dimensional...*

Fall Velocity of Irregular Shaped Particles

*The determination of the free-fall velocity of irregularly shaped particles in viscous fluids is presented. A shape parameter is proposed which correlates Reynolds number with drag coefficient...*

Nonlinear Flow Through Granular Media

*Relative roles of steady and unsteady fluid motion in causing deviation from the linear Darcy resistance law are described. Air velocities and turbulence intensities were measured within...*

Distribution of Energy Losses at Conduit Trifurcations

*An equation for the estimation of energy losses occurring in individual branches of a trifurcation is presented. Experiments were conducted for division of flow on nine trifurcations with...*

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