Turbulence Effects on Drag of Sharp-Edged Bodies
Contrary to popular opinion, wind tunnel tests showed that the drag coefficient of angular shaped bodies is significantly affected by the intensity of the free stream turbulence. For some...

Pipelining of Low-Centration Sand-Water Mixtures
The present study deals with critical deposit velocity VC, defined as the velocity at which particles begin to settle from the carrying medium and...

Effects of Inflow Condition on Hydraulic Jump
The particular aspect of the jump phenomenon considered in the paper concerns the condition of inflow, i.e., the state of flow development of the supercritical stream. Based on an unconventional...

Supercritical Flow over Sills at Incipient Jump Conditions
A laboratory investigation has been conducted to study the conditions mainly responsible for the stabilization and prediction of the hydraulic jump in a rectangular, horizontal-bed channel...

Orifice Losses for Laminar Approach Flow
In all, 25 orifices are studied which include sharp-edged concentric, eccentric and segmental orifices, quadrant-edged concentric orifices and square-edged long orifices. The β ratio (ratio...

Brink Depth for Trapezoidal Broad-Crested Weir
Brink depth characteristics include the relationship between brink depth (yo) and critical depth for parallel flow (yc);...

Onset of Instability of Power-Law Fluid in Couette Flow
The critical Reynolds numbers at the onset of instability of a Newtonian and a power-law fluid, respectively, in the annulus between two coaxial cylinders, with the inner cylinder rotating...

Effect of Channel Shape on Gradually Varied Flow Profiles
An analysis of gradually varied flow profiles with Froude number as a reference parameter is made. Generalized nondimensional varied flow profiles of the M and S types are computed for...

Efficiency of Hydraulic Jump
It has been shown that the existing definitions of the efficiency of hydraulic jump do not furnish a correct picture of the physical phenomenon. A more rational definition of the efficiency...

Hydrodynamic Effects of Seepage on Bed Particles
The effect of effluent and influent seepage on the hydrodynamic forces acting on an idealized noncohesive sediment particle are investigated experimentally. The hydrodynamic conditions...

Fluid Force Analysis and Accelerating Sphere Tests
An adequate expression for the fluid force on an accelerating body depends on whether the history of motion is repetitive. The conventional form for periodic motion consists of the sum...

Drag Coefficients in Nonsteady Turbulent Flow
Drag coefficients for spheres in nonsteady turbulent flow are found to be functions of the acceleration number, and either the particle Reynolds number or the relative turbulence intensity...

Junction Losses in Laminar and Transitional Flows
Analytical and experimental studies were carried out to develop additional data on energy losses at a junction for systems operating in the Reynolds number range of between 10 and 10,000....

Experiments on Plane Couette Flow
A simple method for generating plane Couette flow is described. In this technique the water surface of a covered open-channel flume represents the moving boundary, and measurements are...

Fluid-Dynamic Consideration of Bottom Materials
Bottom materials often involve clay-water suspensions which evidence complex rheology. Studies of the non-Newtonian behavior of kaolin are reported herein. Concentric viscometer analysis...

Characteristics of Flow over Weirs of Finite Crest Width
The characteristics of flow over weirs of rectangular cross-section with finite crest width depend on h/P, h/B, a characteristic Reynolds number, K/h, and Weber number, wherein h, P, B,...

Dispersion in Natural Streams
The one-dimensional mathematical model of dispersion has been developed to account for the loss of dye due to decay and adsorption. This model predicts the time-concentration of the conservative...

Anemometer Height in Froude Scaling of Wind Stress
Extending previously proposed Froude scaling of wind stress coefficients, the paper suggests the appropriate anemometer heights for different wind fetches, and proposes a procedure of...

Unified Analysis of Grid Turbulence
The deficiencies of the conventional power laws for the decay of grid turbulence, i.e., the discontinuous change from an initial to a final zone and the undefined range of validity, have...

Modelling Tidal Flow from Harbors
Problems concerned with the tidal flow of water into and out of harbors are difficult to solve mathematically. For the case of flow in a channel the Froude number may be considered to...

 

 

 

 

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