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  • Other Sources  (6)
  • FLUID MECHANICS AND HEAT TRANSFER  (4)
  • EARTH RESOURCES AND REMOTE SENSING  (2)
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  • Other Sources  (6)
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  • 1
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    Direct simulation of a turbulent oscillating boundary layer (1987)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The turbulent boundary layer driven by a freestream velocity that varies sinusoidally in time around a zero mean is considered. The flow has a rich behavior including strong pressure gradients, inflection points, and reversal. A theory for the velocity and stress profiles at high Reynolds number is formulated. Well-resolved direct Navier-Stokes simulations are conducted over a narrow range of Reynolds numbers, and the results are compared with the theoretical predictions. The flow is also computed over a wide range of Reynolds numbers using a new algebraic turbulence model; the results are compared with the direct simulations and the theory.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: NASA-TM-89460 , A-87220 , NAS 1.15:89460
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    A one-equation turbulence transport model for high Reynolds number wall-bounded flows (1991)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: A one-equation turbulence model that avoids the need for an algebraic length scale is derived from a simplified form of the standard-k-epsilon model equations. After calibration based on well established properties of the flow over a flat plate, predictions of several other flows are compared with experiment. The preliminary results presented indicate that the model has predictive and numerical properties of sufficient interest to merit further investigation and refinement. The one-equation model is also analyzed numerically and robust solution methods are presented.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: AIAA PAPER 91-0610
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    A one-equation turbulence transport model for high Reynolds number wall-bounded flows (1990)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A one-equation turbulence model that avoids the need for an algebraic length scale is derived from a simplified form of the standard k-epsilon model equations. After calibration based on well established properties of the flow over a flat plate, predictions of several other flows are compared with experiment. The preliminary results presented indicate that the model has predictive and numerical properties of sufficient interest to merit further investigation and refinement. The one-equation model is also analyzed numerically and robust solution methods are presented.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: NASA-TM-102847 , A-90231 , NAS 1.15:102847
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    LANDSAT survey of near-shore ice conditions along the Arctic coast of Alaska (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The author has identified the following significant results. Winter and spring near-shore ice conditions were analyzed for the Beaufort Sea 1973-77, and the Chukchi Sea 1973-76. LANDSAT imagery was utilized to map major ice features related to regional ice morphology. Significant features from individual LANDSAT image maps were combined to yield regional maps of major ice ridge systems for each year of study and maps of flaw lead systems for representative seasons during each year. These regional maps were, in turn, used to prepare seasonal ice morphology maps. These maps showed, in terms of a zonal analysis, regions of statistically uniform ice behavior. The behavioral characteristics of each zone were described in terms of coastal processes and bathymetric configuration.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E78-10136 , NASA-CR-157148
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Unknown
    Growth mechanisms of 'Katie's Floeberg' (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The growth mechanism of the grounded ice feature on Hanna's Shoal, located at approximately 162 deg W, 72 deg N in the Chukchi Sea, has been analyzed using Landsat I and II satellite imagery. The primary mechanism of growth was deduced to be the formation of large wedges of ice against the upstream edge of the feature. These wedges of piled ice form in three stages and may or may not become permanently affixed to the core of the feature. Remains of these growth patterns can sometimes be seen in the interior of the feature on the satellite imagery.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Arctic and Alpine Research; 10; 4, 19; 1978
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Unknown
    Direct simulation of a turbulent oscillating boundary layer (1987)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: The turbulent boundary layer driven by a freestream velocity that varies sinusoidally in time around a zero mean is considered. The flow has a rich behavior including strong pressure gradients, inflection points, and reversal. A theory for the velocity and stress profiles at high Reynolds number is formulated. Well-resolved direct Navier-Stokes simulations are conducted over a narrow range of Reynolds numbers, and the results are compared with the theoretical predictions. The flow is also computed over a wide range of Reynolds numbers using a new algebraic turbulence model; the results are compared with the direct simulations and the theory.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: Symposium on Turbulent Shear Flows; Sept. 7-9, 1987; Toulouse; France
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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