Effect of Stream Turbulence on Heater Water Plumes
The situation of a heated water surface jet flowing at the mean local velocity in open channel flow is studied. The jet contains no excess momentum that can cause mixing by relative motion...

Potential Flow of a Two-Dimensional Conduit Outlet
A theory is presented to describe the potential flow of liquid at a two-dimensional conduit outlet. A detailed description of the flow is given by an integro-differential equation derived...

Limitations to Length of Contained Oil Slicks
The drag forces exerted by a current passing beneath a contained oil slick cause it to thicken in the direction of the flow. In rivers and channels of finite depth this process cannot...

Rainfall Effect on Sheet Flow over Smooth Surface
The variation of friction factor for different flows and rainfall conditions is established by statistical analysis. Boundary shear stress was directly measured by hot-film anemometry....

Friction Factor and Reynolds Number in Porous Media Flow
The concept of hydraulic radius of pore space is used to substantiate that the square root of the permeability is the important length parameter in defining the friction factor and Reynolds...

Determination of Kennedy's Parameter j for Dunes
The purpose of this note is to suggest a method for the evaluation of j when the sand waves are dunes and the flow is sufficiently tranquil....

Prediction of Near-Surface Drift Currents from Wind Velocity
A practical procedure is outlined for determining wind-induced drift currents near the free surface, at all fetches, from a single wind-velocity measurement. The wind stress is scaled...

Energy Losses at 90° Pipe Junctions
The loss coefficients and the power-loss coefficients for four smooth tees with diameter ratio of unity were determined experimentally for each of all configurations of flow through tees....

Turbulent Entrainment in Buoyant Jets and Plumes
The behavior of turbulent buoyant jets in uniform density environments is found to be governed by an entrainment function and buoyancy function, both of which are functions of the local...

Bed Scour at End-Dump Channel Constrictions
One method of constricting a channel is by end-dumping loose rockfill from one or both banks. This study is concerned with bed scour that occurs around the leading face and downstream...

Wave Forces on Submerged Objects of Symmetry
Stokes' linear irrotational wave theory is employed to obtain expressions for wave forces on submerged objects of symmetry, e.g., a hemisphere or a sphere, a horizontal halfcylinder...

Spatially Varied Flow over Side-Weirs
An experimental investigation of the flow over sharp edged side-weirs in rectangular channels is reported. The experiments cover subcritical and supercritical flow regimes with weirs of...

Gradually Varying Two-Layer Stratified Flow
The basic equations of stratified flow in fiords are outlined. The mechanism of entrainment is physically explained, and the entrainment is then related to the shear stress at the interface...

Oil Booms in Tidal Currents
The oil capacity of a boom deployed in U-shape in a current depends primarily on the densimetric Froude number, with a critical Froude number above which the boom holds no oil, and an...

Treatment Efficiency of Waste Stabilization Ponds
A practical method is given for evaluating the influence of the hydraulics on waste water pond performance. The analysis is based on time-concentration data collected at the outlet for...

Drag Coefficient of Cylinders in Turbulent Flow
The effects of free-stream turbulence on the drag coefficient of a circular cylinder were investigated experimentally in an air duct. The experiments were performed over a range of Reynolds...

Reattaching Flow Downstream of Leaf Gate
Measurements have been made of the mean velocities and wall pressures downstream of a blockage simulating a partially closed leaf gate, and the extent of recirculation has been formed....

Dynamics of Contained Oil Slicks
An oil slick contained on the surface of a flowing stream may be divided into two zones of influence; a frontal region where dynamic forces are dominant and a viscous zone where viscous...

Boundary Layer Effects on Hydraulic Jump Location
The rate of displacement of the toe of a hydraulic jump along a channel with respect to change in tailwater elevation is defined as the position sensitivity of the jump. The steady flow...

Appearance of Unstable Buoyant Jet
The flow of a turbulent vertical plume in a stagnant ambient fluid of uniform density was examined theoretically and experimentally. It was shown that a real solution to the equations...

 

 

 

 

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