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  • Turbulence in sheared, salt-fingering favorable environment

    Creator:
    Kimura, Satoshi
    Abstract:
    Instability and turbulence in sheared, salt-fingering favorable stratification are studied using three-dimensional direct numerical simulations (DNS). Salt-fingering favorable stratification is gravitationally stable, because the unstable vertical gradient of salinity is stabilized by temperature (warm, salty over cool, fresh water-masses). Salt-fingering instability can occur at the interface of these different water-masses....
    Resource Type:
    Dissertation
    Full Text:
    : Turbulence in Sheared, Salt-fingering Favorable Environment Abstract approved: William D. Smyth

  • Turbulence and biophysical fluxes in the near surface ocean

    Creator:
    Hoecker-Martínez, Martín
    Abstract:
    Vertical transports of plankton, momentum, heat, and turbulence are modeled. A novel integration of high resolution turbulence and biophysical modeling is used to show the influence of a Kelvin-Helmholtz instability on the vertical migration of simple gyrotactic organisms. A viscous limit on mixing driven by shear turbulence is proposed. Large...
    Resource Type:
    Dissertation
    Full Text:
    biophysical fluxes in the near surface ocean. Abstract Approved: William D. Smyth Vertical transports of

  • Destabilization of a Stratified Shear Layer by Ambient Turbulence

    Creator:
    Li, Lin
    Abstract:
    A small eddy viscosity or mass diffusivity that varies with height has been found to have unexpected effects on the Kelvin-Helmholtz (KH) instability of a stably stratified shear layer near the neutral stability boundary. In particular, varying viscosity can increase the growth rate of the instability in contrast to the...
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________ William D. Smyth ABSTRACT A small eddy viscosity or mass diffusivity that varies with

  • Shear and convective turbulence in a model of thermohaline intrusions

    Creator:
    Mueller, Rachael
    Abstract:
    Thermohaline interleaving is an important mechanism for laterally fluxing salt, heat, and nutrients between oceanic water masses. Interleaving is driven by a release of potential energy resulting from the vastly differing diffusivities of heat and salt in seawater. The flows are composed of stacked intrusions that flux more buoyant and...
    Resource Type:
    Masters Thesis
    Full Text:
    Turbulence in a Model of Thermohaline Intrusions Abstract approved: William D. Smyth Thermohaline

  • Secondary Kelvin-Helmholtz instability in weakly stratified shear flow

    Creator:
    Smyth, William D.
    Abstract:
    The growth of secondary vortices on the braids separating Kelvin–Helmholtz billows is investigated via numerical simulations. The similarity theory of Corcos & Sherman (1976) is extended to include mixing processes with Prandtl number greater than unity, and is shown to provide a useful description of the physics of the braid...
    Resource Type:
    Article
    Full Text:
    weakly stratified shear flow By WILLIAM D. SMYTH College of Oceanic and Atmospheric Sciences, Oregon

  • Instability and Diapycnal Momentum Transport in a Double-Diffusive, Stratified Shear Layer

    Creator:
    Smyth, William D. and Kimura, Satoshi
    Abstract:
    The linear stability of a double-diffusively stratified, inflectional shear flow is investigated. Double-diffusive stratification has little effect on shear instability except when the density ratio R[subscript]ρ is close to unity. Double-diffusive instabilities have significant growth rates and can represent the fastest-growing mode even in the presence of inflectionally unstable shear...
    Resource Type:
    Article
    Full Text:
    -Diffusive, Stratified Shear Layer WILLIAM D. SMYTH AND SATOSHI KIMURA College of Oceanic and Atmospheric

  • Length scales of turbulence in stably stratified mixing layers

    Creator:
    Smyth, William D. and Moum, James N.
    Abstract:
    Turbulence resulting from Kelvin–Helmholtz instability in layers of localized stratification and shear is studied by means of direct numerical simulation. Our objective is to present a comprehensive description of the turbulence evolution in terms of simple, conceptual pictures of shear–buoyancy interaction that have been developed previously based on assumptions of...
    Resource Type:
    Article
    Full Text:
    2000 Length scales of turbulence in stably stratified mixing layers William D. Smytha) and James N

  • Evaluating desiccated cyanobacteria Aphanizomenon flos-aquae for use as a biofertilizer on Swiss Chard

    Creator:
    Turk, Douglas E.
    Abstract:
    Non-toxic species of desiccated blue-green algae, or cyanobacteria, may offer potential for use as a fertilizer on irrigated crops. Here, the non-toxic cyanobacteria species Aphanizomenon flos-aquae (AFA), collected from Upper Klamath Lake, Oregon, was evaluated for use as a biofertilizer in a controlled experiment on Swiss chard “Bright Lights” (Beta...
    Resource Type:
    Research Paper
    Full Text:
    Milligan and Dr. Johanna (Caity) Smyth for their guidance and patience throughout the course of this

  • Effect of Protease Inhibitors on Steady-State Pharmacokinetics of Oral Norethindrone Contraception in HIV-Infected Women

    Creator:
    Atrio, Jessica, Stanczyk, Frank Z., Neely, Michael, Cherala, Ganesh, Kovacs, Andrea, and Mishell, Daniel R., Jr.
    Abstract:
    OBJECTIVE: Pharmacokinetic interactions exist between combined oral contraceptives and protease inhibitors (PI). However, such information is lacking for progestin-only oral contraception. We sought to define the steady-state pharmacokinetic interaction between norethindrone (NET) and PI in HIV-infected women. METHODS AND DESIGN: We conducted an open-label, prospective, nonrandomized trial to characterize the...
    Resource Type:
    Article
    Full Text:
    ., Stanczyk, F. Z., Neely, M., Cherala, G., Kovacs, A., & Mishell Jr, D. R. (2014). Effect of Protease

  • Nonlinear internal waves on the continental shelf

    Creator:
    Shroyer, Emily L.
    Abstract:
    The properties and evolution of nonlinear internal waves (NLIWs) depend upon the background conditions within which waves form, propagate, and dissipate. As a result, the NLIW field on the New Jersey shelf displayed dramatic variability during the Shallow Water 2006 experiment. Wave variability was exhibited by 1) amplitudes that ranged...
    Resource Type:
    Dissertation
    Full Text:
    Smyth, and William Hetherington. I feel very fortunate to have worked with such ex- ceptional