Search Constraints

Start Over
Filtering by: Subject Turbulent boundary layer Remove constraint Subject: Turbulent boundary layer Degree Name Master of Science (M.S.) Remove constraint Degree Name: Master of Science (M.S.)

Search Results

  • Turbulence structure within an inclined laboratory convection tank

    Creator:
    Nance, Jon D.
    Abstract:
    A baroclinic, convective mixed-layer was modeled, using water, in a laboratory convection tank identical to that used in the free convection study of Deardorff and Willis (1985). Baroclinicity and mean-flow shearing were achieved by tilting the tank by an angle of 1O⁰. The resulting mechanical-production rate of turbulence kinetic energy...
    Resource Type:
    Masters Thesis
    Full Text:
    boundary layer in a state of free convection (Willis and Deardorff, 1974; Deardorff and Willis, 1985) For

  • Transpiration and the atmospheric boundary layer : progress in modeling feedback mechanisms

    Creator:
    Heinsch, Faith Ann
    Abstract:
    Simple models of transpiration, e.g., the Penman-Monteith equation, treat atmospheric conditions as driving variables. In fact, transpiration modifies temperature and humidity throughout the convective boundary layer, creating feedbacks that stabilize the water use of vegetation. This thesis concentrates on the new empirical relationships proposed by Monteith (1995), for developing simple...
    Resource Type:
    Masters Thesis
    Full Text:
    the Atmospheric Boundary Layer: Progress in Modeling Feedback Mechanisms. Abstract approved: Simple

  • Flow over surface discontinuities in a marine environment

    Creator:
    Moore, Erin M.
    Abstract:
    This study concentrates on analysis of LongEZ aircraft data taken offshore of the Atlantic Coast of the United States. Due to the land structure of the region, it was possible to isolate the effect of narrow land on air as it flows offshore. The narrow land (Outer Banks) separates inland...
    Resource Type:
    Masters Thesis
    Full Text:
    internal boundary layer (IBL) over land grows deeper and the eddies presumably grow larger. Larger eddies

  • A nonlocal mixing formulation for the atmospheric boundary layer

    Creator:
    Frech, Michael C.
    Abstract:
    A two-scale approach for the turbulent mixing of momentum in an unstable stratified boundary layer is proposed in an attempt to eliminate existing inconsistencies between parameterized mixing of heat and momentum. The parameterization of the large eddy stress is suitable for simple boundary layer models where computational efficiency is important....
    Resource Type:
    Masters Thesis
    Full Text:
    Formulation for the Atmospheric Boundary Layer Abstract approved: A two-scale approach for the turbulent

  • A study of the relationship between ageostrophy and dynamical periodicities of the tropical Pacific Boundary Layer

    Creator:
    McCandlish, Cole B.
    Abstract:
    Eight years (1980-87) of twice-daily high-resolution radiosonde data from a tropical mid-Pacific island station are analyzed to generate time series of the planetary boundary layer (PBL) top pressure, an ageostrophic parameter (related to the divergence), and a parameter of mean PBL specific humidity. Sample spectra of these time series are...
    Resource Type:
    Masters Thesis
    Full Text:
    Relationship Between Ageostrophy and Dynamical Periodicities of the Tropical Pacific Boundary Layer Abstract

  • Dynamics of a differentially-heated geophysical boundary layer

    Creator:
    Smith, Bartlett Knapp
    Abstract:
    An analytical two-layer model consisting of a time-dependent stratified boundary layer topped by stratified free flow is developed in order to study atmospheric boundary layer production of vertical motion. To avoid use of a constant eddy viscosity, the boundary layer equations are layer-integrated over a fixed depth, and surface stress...
    Resource Type:
    Masters Thesis
    Full Text:
    0 and p. Neglecting turbulent fluxes at the boundary layer top and layer-integrating equations (7

  • Turbulent structure in the bora and stable boundary layer

    Creator:
    Frank, Helmut P.
    Abstract:
    An eigenvector analysis of the velocity-temperature correlation matrix is applied to clear-air turbulence measured by aircraft in the Bora. The eigenvectors are identified with the main eddies of the turbulence. This study attempts to infer the three-dimensional structure of these eddies. The results are compared with turbulent structures in the...
    Resource Type:
    Masters Thesis
    Full Text:
    Bora and Stable Boundary Layer Abstract approved: Larry Mahrt An eigenvector analysis of the

  • A numerical study of mesoscale motion in the atmospheric mixed layer

    Creator:
    Ruscher, Paul Harold
    Abstract:
    The numerical modeling of motions in the atmosphere's planetary boundary layer (PBL) is a challenging task. In general, the boundary layer interacts with both the overlying atmosphere and the underlying land or water surface in a complex manner. Random turbulence is also present in the PBL which precludes exact prediction...
    Resource Type:
    Masters Thesis
    Full Text:
    interaction. The boundary layer is a turbulent fluid; turbulence is a random, small-scale flow phenomenon

  • Photographic analysis of buoyant stack plumes in a laboratory model of the turbulent mixed layer

    Creator:
    Hukari, Neil F.
    Abstract:
    Four buoyant plumes were produced within a laboratory convectively mixed layer from a source height of about z[subscript s] = 0.15 h, where h is the height of the convectively mixed layer. The projected images of these plumes in the X-Z plane were analyzed using a densitometer (photomultiplier tube) to...
    Resource Type:
    Masters Thesis
    Full Text:
    Buoyant Stack Plumes in a Laboratory Model of the Turbulent Mixed Layer Abstract approved: Four buoyant

  • Penetrative elements at the top of the atmospheric mixed layer

    Creator:
    Paumier, James
    Abstract:
    High resolution data of moisture, temperature and wind velocity collected by aircraft during the 1975 Air Mass Transformation Experiment (ANTEX '75) provide information for detailed investigations of the phenomena occurring at the top of a cloud-topped mixed layer. Joint frequency diagrams of humidity and temperature reveal that for parts of...
    Resource Type:
    Masters Thesis
    Full Text:
    Numerous statistical studies of the top of the atmospheric boundary layer have been conducted, both