The aim of this study is to compare observational data to data simulated by a one dimensional model. Observational data collected from January to July 2006 at Lake Whitney, Texas, included water current velocities from an Acoustic Doppler Current Profiler, and an Acoustic Doppler Velocimeter from which shear stress, turbulent kinetic energy dissipation rates, and turbulence kinetic energy were computed using several methods. Numerical model experiments, forced by the surface heat and momentum fluxes, velocity profiles, and temperature profiles were conducted to simulate the development of the turbulence parameters. Two equation models, k-epsilon and k-kl, were used to find which model best describes the observed physical processes (turbulence kinetic energy, turbulent kinetic energy dissipation rate and velocity variances). The combined observational and simulated results show a change in stratification levels that consequently leads to variations in turbulent kinetic energy dissipation rate, turbulent kinetic energy, and the velocity variances. In order to investigate the accuracy of the model, we quantitatively compared these parameters to estimates from the observed data in the bottom boundary layer. In general, the model and observational data agree well for the three parameters, with the exception of some time periods, during which the model prediction differed from the observed. This was at times when the Acoustic Doppler Velocimeter measurements were at the noise level of the instrument. Overall, the k-kl model simulation results appear to be closer to the observational results during the weakly and strongly stratified periods than the k-epsilon model.

Typescript. / Thesis (Ph. D.)--University of Hawaii, 1968. / Bibliography: leaves [80]-87. / xi, 87 l illus., tables

The thesis presents a technique for and results of surface force measurements in a 3-phase system. The phases are a solid medium (mica), fluid (water and water-based electrolyte solutions) and gas (an air bubble). Analysis of deformation of the air bubble with respect to mutual position of the bubble and the mica surface, the capillary pressure of the undeformed bubble surface, the capillary pressure, and the disjoining pressure provide data for calculation of the air-liquid surface electrical potential. Furthermore, the information extracted from the deformation analysis made it possible to draw a conclusion regarding the nature of electrical double-layer forces in the system and, to some degree, about the effect of ion properties on the surface charging properties of the air-liquid interface. / Surface forces between an air bubble and a flat mica surface immersed in aqueous electrolyte solutions have been investigated using a modified surface force apparatus. This method allows forces to be detected in two regimes: at long range where the bubble is distorted slightly by the surface forces, and at short range where the force is manifest as disjoining pressure in a thin wetting film separating the bubble from the solid. The force was calculated from the equilibrium (or quasi-equilibrium) shape of the bubble surface. The experiments clearly show that long-range double-layer repulsion acts between mica and an air bubble in water and electrolyte solutions of different concentration. Double-layer repulsion indicates that the air bubble surface is negatively charged. However, there is clear evidence that charge regulation occurs at the air-water interface to maintain a constant surface potential, and as a result of this, the charge at this interface changes from negative to positive as the bubble approaches the negatively charged mica surface. Because of the attraction that arises due to the charge reversal, excessive force is required to separate the bubble from the mica, though the mica remains completely wetted by the aqueous phase. / The air-liquid surface potential has been evaluated from fitting a theoretically calculated shape to experimental measurements of bubble shape and film thickness, where the theoretical bubble shape was obtained from the numerical solution of the augmented Young-Laplace equation. Potential on the air bubble surface mainly depends on the concentration of electrolyte but is insensitive to the type of cation or anion within the low range of concentration investigated here. / The more important issue for such concentrations appears to be the electrostatic interaction between ions in solution and the air bubble interface. Therefore at the concentrations investigated, the potential on the gas-liquid interface arises due to the non-specific adsorption of ions to oriented water dipoles at the interface. / Thesis ([PhDApSc(MineralsandMaterials)])--University of South Australia, 2005.

Thesis (M.S.)--University of Nevada, Reno, 2007. / "August, 2007." Includes bibliographical references (leaves 74-76). Online version available on the World Wide Web.

Thesis (Ph.D.)--Tufts University, 1999. / Adviser: Behrouz Abedian. Submitted to the Dept. of Mechanical Engineering. Includes bibliographical references (leaves 105-110). Access restricted to members of the Tufts University community. Also available via the World Wide Web;

Thesis (Ph.D.)--Baylor University, 2007. / Includes bibliographical references (p. 107-109).

Thesis (Ph.D.)--McMaster University (Canada), 1993. / Source: Dissertation Abstracts International, Volume: 54-12, Section: B, page: 6259. Adviser: Jules P. Carbotte.

Thesis (Ph. D.)--University of Melbourne, 1989. / Typescript (photocopy). Includes bibliographical references (leaves 255-261).

Thesis (Ph. D.)--University of Adelaide, Dept. of Physics, and Mathematical Physics, 1993. / Includes bibliographical references (leaves 154-163).

Thesis (Ph.D.); Submitted to the University of California, Berkeley, 210 Hearst Mining Memorial Bldg, Berkeley, CA 94720 (US); 21 Dec 2004. / Published through the Information Bridge: DOE Scientific and Technical Information. "LBNL--57248" Cardozo, Benjamin Lewin. USDOE. Office of Management Budget and Evaluation National Aeronautics and Space Administration. Ames Research Center Orders A53228D and NNA04CA94I (US) 12/21/2004. Report is also available in paper and microfiche from NTIS.