Large-Scale Roughness in Open-Channel Flow
A new method of predicting resistance to flow in open channels with large roughness elements is proposed. The roughness elements investigated consisted of 6-in. and 3.75-in. cubes; these...

Theory of Water Filtration
The Kozeny equation of laminar flow through granular materials is extended to the transition region by means of a chart of the friction factor versus the Reynolds number. A chart of the...

Film Flow Along a Vertical Cylinder
A mathematical procedure is presented for the case of flow of a thin liquid film along the wall of a vertical cylinder. Surface tension forces are neglected. The velocity function is assumed...

Viscous and Boundary Effects on Virtual Mass
The virtual mass of a sphere oscillating in a fluid filling a fixed concentric spherical shell was determined experimentally for seven ratios of sphere diameter to shell diameter. These...

Aeroelastic Vibration of a Steel Arch
The cause of vibration of a building with an unusual frontal profile is found to be the vortex shedding. Of the seven corrective measures considered, only the increase of the number of...

Boundary Flow Along a Circular Cylinder
The Karman-Prandtl mixing-length theory for fluid flow over a flat surface with a laminar sublayer near the boundary is adapted to the flow along an infinite circular cylinder on the supposition...

Wave Action at Spillways
The height of progressive irregular waves observed to exist downstream from spillways was found to have a normal distribution. The significant wave height depended on Froude number, downstream...

Sliding of Composite-Type Breakwaters by Breaking Waves
In order to prove that experimental results would be applicable to prototype conditions with reasonable accuracy according to Froude's law of similarity and that the sliding...

Groups of Vertical Cylinders Oscillating in Water
Drag, lift, and moment on twenty-four parallel vertical 1/2-in. cylinders oscillating with 13-in. amplitude in water were measured in a laboratory tank 5.5 ft by 16 ft. A comparison, Do,...

Manning Roughness Factors for Concrete Sewer Pipe
Study of roughness characteristics of high quality concrete pipe of 6 in., 8 in., and 12 in. diam; full flow conditions were determined with just slight pressure head existing on lines;...

Study of Scour Around Spur-Dikes
Investigation was conducted in 2 ft wide by 25 ft long nonrecirculating flume; effect of flow, spur-dike, and sediment characteristics on maximum scour depth; it was found that Froude...

Irrotational Motion of Two Fluid Strata towards a Line Sink
Flow of two fluids of different density towards line sink located in bottom corner of rectangular configuration with upstream and extending to infinity, was studied by relaxation techniques;...

Drag and Lift on Spheres within Cylindrical Tubes
Method for evaluating lift and drag forces that are exerted by moving fluid on spherical particle resting on bottom of cylindrical tube; experimental data presented show variation in lift...

Models Primarily Dependent on the Reynolds Number
Design, construction, and operation of models of closed-conduit fluid systems, and interpretation of test data; viscous and inertia forces in flowing fluids of such models, and hence Reynolds...

Models Primarily Dependent on the Reynolds Number
Design, construction, and operation of models of closed-conduit fluid systems, and interpretation of test data; viscous and inertia forces in flowing fluids of such models, and hence Reynolds...

Drag and Lift on Spheres within Cylindrical Tubes
Method for evaluating lift and drag forces that are exerted by moving fluid on spherical particle resting on bottom of cylindrical tube; experimental data presented show variation in lift...

Irrotational Motion of Two Fluid Strata Towards a Line Sink
Flow of two fluids of different density towards line sink located in bottom corner of rectangular configuration with upstream and extending to infinity, was studied by relaxation techniques;...

Absorption of Oxygen from Air Bubbles in Water
Correlations developed to define absorption; relationships developed between liquid film coefficient, KL and Reynolds and Schmidt Numbers at liquid...

Stratified Flow into a Line Sink
Study of discharge of stratified fluid through horizontal slot at end of channel; experiments show that when densimetric Froude number is less than 0.28 flow pattern is divided into two...

Turbulence Characteristics of the Hydraulic Jump
Hot wire measurements of turbulence in air flow model of hydraulic jump described for Froude numbers of 2, 4, and 6; results analyzed and interpreted in light of momentum and energy integrals....

 

 

 

 

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