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  • Computer Programming and Software  (1)
  • SPACECRAFT PROPULSION AND POWER  (1)
  • Superfluidity and superconductivity  (1)
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  • 1
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    Anomalous dependence of c-axis polarized Fe B_{1g} phonon mode with Fe and Se concentrations in Fe_{1+y}Te_{1−x}Se_{x} (2012)
    American Physical Society (APS)
    Details
    Publication Date: 2012-02-28
    Description: Author(s): Y. J. Um, A. Subedi, P. Toulemonde, A. Y. Ganin, L. Boeri, M. Rahlenbeck, Y. Liu, C. T. Lin, S. J. E. Carlsson, A. Sulpice, M. J. Rosseinsky, B. Keimer, and M. Le Tacon We report on an investigation of the lattice dynamical properties in a range of Fe 1+ y Te 1− x Se x compounds, with special emphasis on the c -axis polarized vibration of Fe with B 1 g symmetry, a Raman active mode common to all families of Fe-based superconductors. We have carried out a systematic study of ... [Phys. Rev. B 85, 064519] Published Mon Feb 27, 2012
    Keywords: Superfluidity and superconductivity
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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    PAPER CURRENT
  • 2
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    Numerical simulation of flow path in the oxidizer side hot gas manifold of the Space Shuttle main engine (1987)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The purpose of this study is to examine in detail incompressible laminar and turbulent flows inside the oxidizer side Hot Gas Manifold of the Space Shuttle Main Engine. To perform this study, an implicit finite difference code cast in general curvilinear coordinates is further developed. The code is based on the method of pseudo-compressibility and utilize ADI or implicit approximate factorization algorithm to achieve computational efficiency. A multiple-zone method is developed to overcome the complexity of the geometry. In the present study, the laminar and turbulent flows in the oxidizer side Hot Gas Manifold have been computed. The study reveals that: (1) there exists large recirculation zones inside the bowl if no vanes are present; (2) strong secondary flows are observed in the transfer tube; and (3) properly shaped and positioned guide vanes are effective in eliminating flow separation.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: AIAA PAPER 87-1800
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Age-of-Air, Tape Recorder, and Vertical Transport Schemes (2000)
    In:  Other Sources
    Details
    Publication Date: 2019-07-17
    Description: A numerical-analytic investigation of the impacts of vertical transport schemes on the model simulated age-of-air and the so-called 'tape recorder' will be presented using an idealized 1-D column transport model as well as a more realistic 3-D dynamical model. By comparing to the 'exact' solutions of 'age-of-air' and the 'tape recorder' obtainable in the 1-D setting, useful insight is gained on the impacts of numerical diffusion and dispersion of numerical schemes used in global models. Advantages and disadvantages of Eulerian, semi-Lagrangian, and Lagrangian transport schemes will be discussed. Vertical resolution requirement for numerical schemes as well as observing systems for capturing the fine details of the 'tape recorder' or any upward propagating wave-like structures can potentially be derived from the 1-D analytic model.
    Keywords: Computer Programming and Software
    Type: SPARDC; Nov 06, 2000 - Nov 10, 2000; Mar del Plata; Argentina
    Format: text
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    NASA TECHNICAL REPORTS
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