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"July 2002" Includes bibliographical references (leaves 216-221) Appendix A. MATLAB code

"July 2002" / Includes bibliographical references (leaves 216-221) / viii, 240 leaves : ill. (some col.), plates (some col.) ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, Dept. of Mechanical Engineering, 2002

Thesis (Ph. D.)--Oregon State University, 1964. / Typescript. Includes bibliographical references (leaves 182-191). Also available on the World Wide Web.

Thesis (M.Eng.)--University of Louisville, 2007. / Title and description from thesis home page (viewed December 14, 2007). Department of Chemical Engineering. Vita. "July 2007." Includes bibliographical references (p. 124-126).

The purpose of this study was to ascertain the potential erosion impacts associated with ship movements in confined waters. The flow associated with a ship passage can be separated accordingly: (1) the propeller wake, (2) flow about the hull, and (3) associated waves. Each of these areas has been analyzed to determine their respective potential for causing channel erosion. Extensive field work was planned to determine the magnitude of the associated flows in a channel due to a shill) passage, but numerous problems developed that limited the amount of useful data obtained. As an alternative approach, use was made of data presented by other authors concerning channel flow effects caused by a ship passage. SOGREAH test results regarding Kiel Canal flows and ship related disturbances (Wasser-und Schiffahrtsdirektion Kiel, 1966) appear to be particularly applicable for the Coos Bay shipping channel because the channel dimensions and ship sizes in the two areas are approximately equal From the Coos Bay field work that was completed and from the extrapolations of the SOGREAH test results, the total erosion caused by ship traffic in Coos Bay was estimated to be insignificant compared to the natural erosion and deposition that takes place in the estuary. / Graduation date: 1977 / Best scan available. Original is a black and white photocopy.

In plume theory it is generally assumed that a plume issuing from a round source maintains a round cross section throughout. The consequences of this hypothesis are significant; this fact should motivate research into its validity. This paper investigates conditions and analyzes mechanisms that cause fluid plumes to undergo systematic deformation in their cross section. The process of deformation is referred to as differential growth. In search of support for these ideas some available plume experiments are investigated and some supporting evidence is found and presented. It is argued that ambient wind and variations in vertical buoyancy cause these effects. A rudimentary examination of plume physics tends to support these ideas. Approximations for these mechanisms are developed. For simplicity an important approximation is made in characterizing the plume cross section with an ellipse. By way of illustrating the effect of such cross sections on plume dynamics the computer plume model of Winiarski and Frick is adapted for differential growth. Based on the results of these modifications of the model compared with round plume results and compared with some plume data it is found that the modified model is able to predict behavior the conventional theory does not predict. / Graduation date: 1977

The effect of jet flow pulsing and blowing ratio on a jet in cross flow has been investigated. Preliminary jet flow studies were performed without cross flow and an extensive study of jet with cross flow was done for a total of nine test cases. The effect of velocities ratios of 0.85 and 3.4, as well as pulsing the jet flow at 20Hz, was investigated in the near and far field of the jet. A comparison between the jet in cross flow and an inclined cylinder in cross flow was also performed. Hot film measurements were taken within a grid of the flow field in the jet symmetry plane and out of the symmetry plane. Instantaneous velocities were generated at each location and mean velocity, RMS values, Reynolds stresses and mean vorticity were calculated and compared for each case. The higher velocity ratio case (VR=3.4) caused the jet flow to lift up from the wall penetrating into the cross flow compared to the lower velocity ratio case (VR=0.85) where the jet fluid remained attached to the wall and no lift off was observed. The higher velocity ratio case resulted in increased mean velocities, RMS values, Reynolds stresses and mean vorticity throughout the flow field compared to the low velocity ratio case. Secondary turbulent structures were discovered in the wake region of the inclined cylinder. Similar structures were absent in the downstream flow region during the jet in cross flow experiments. There was no significant effect on the jet trajectory as a result of jet pulsing. For both velocity ratio cases the jet trajectory remained similar to the steady cases. Jet pulsing increased the instantaneous velocity RMS levels and Reynolds stresses in the near field of the jet, but did not seem to affect the RMS levels and Reynolds stresses beyond x/d=4. Jet pulsing had a significant effect on the distribution of spectral energy. Distinct energy peaks are generated at the pulsing frequency and its harmonics. The distinct spectral peaks were largest close to the jet exit and within the jet flow, but were detectable throughout the entire flow field. / Graduation date: 2003

Graduation date: 2001