Engineered log jams (ELJs) are commonly implemented in rivers to stabilize streambanks and diversify fish habitat, but few studies have verified the hydraulic benefits of ELJs by assessing their effects on the flow field. This field and modeling study assessed the effects of an ELJ on various characteristics of the...
Friction factors were measured for water flowing in ducts made
up of two rods held between two flat plates. Three rod diameters of
0.50, 1.00 and 1.50 inches were used. The spacings between rods
varied from 0.0 to 0.32 inch. It was found that the concept of
hydraulic diameter was...
We investigate in this thesis, the problem of stability
of thermo-viscoelastic fluid flow between rotating
coaxial cylinders. By using the thermo-viscoelastic
constitutive equations given by Eringen, we reduce the
equations of motion into a form suitable for stability
analysis. The course of reduction which we follow yields
some interesting intermediate...
The stability of fluids in porous media subject to
various physical and geometrical conditions is studied
here. Criteria for the onset of convective motions are
given in terms of critical temperature gradients or heat
sources. The general method used involves the linearization
of the field equations about the hydrostatic solutions...
Certain fluids exhibit an increase in flow resistance when subjected to an electric field. This electroviscous response, known as the
Winslow effect, has been the basis for development of a unique control
medium. Applying a strong potential across the fluid causes it to
"stiffen", even to the point of ceasing...
The turbulent interchange of matter between parallel adjacent
subchannels in a simulated rod bundle for single phase flow was investigated
to determine the effects of mass flow rate and rod spacing.
The simulated rod bundle was made by placing six 1-inch diameter
rods in a square-square array. The overall test...
A finite element formulation is developed for the prediction of
the large displacement response of pipelines which are placed upon
irregularly contoured marine sediments and are subsequently subjected
to episodic hydrodynamic loads. The equations of motion during each
episode of extreme wave activity are obtained from a variational form
of...
The in-line force power spectrum is predicted by the frequency domain maximum force coefficient [C[subscript μn](z,f[subscript n])] vs. Keulegan-Carpenter number [K[subscript n] (z,f[subscript n])] relationship. The frequency domain Keulegan- Carpenter number is defined as the velocity from the amplitude spectrum at f divided by the respective frequency and diameter of...