Search Results - (Author, Cooperation:T. Strohmayer)

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  1. 1
    Staff View
    Publication Date:
    2015-10-23
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Staff View
    ISSN:
    1476-4687
    Source:
    Nature Archives 1869 - 2009
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Notes:
    [Auszug] Soft γ-ray repeaters (SGRs) emit multiple, brief (∼0.1-s), intense outbursts of low-energy γ-rays. They are extremely rare—three are known in our Galaxy and one in the Large Magellanic Cloud. Two SGRs are associated with young supernova remnants (SNRs), and therefore most ...
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  3. 3
    Staff View
    ISSN:
    1476-4687
    Source:
    Nature Archives 1869 - 2009
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Notes:
    [Auszug] If y-ray bursters (GRBs) are at cosmological distances, the dearth of weak events results from the expansion of the universe, either because the signal is redshifted out of the bandpass of the instrument, and/or through evolution of the sources. The relative number of bursts at different ...
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  4. 4
    Weigand, B. ; Neumann, O. ; Strohmayer, T. ; Beer, H.
    Springer
    Published 1995
    Staff View
    ISSN:
    1432-1181
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Physics
    Description / Table of Contents:
    Zusammenfassung Überlagerte freie und aufgezwungene Konvektionsströmung in einem gekühlten vertikalen Kanal mit Eisschichtbildung an den Wänden ist numerisch untersucht worden. Grundlage der Eisschichtberechnung ist das einfache numerische Modell der Grenzschichtgleichungen. Für den Fall der dem Gravitationsvektor gleichgerichteten, gemischten Konvektion wird eine Verstärkung des Wärmeübergangs beobachtet, da die Strömungsgeschwindigkeit in der Nähe der Phasengrenze zunimmt. Aufgrund der Massenerhaltung kann es bei einer ausgeprägten Geschwindigkeitszunahme in der Nähe der Phasengrenze zu Rückströmungen in der Kanalmitte kommen. Die numerischen Ergebnisse zeigen gute Übereinstimmung mit Messungen von Campbell und Incropera [10]. Für den Fall der dem Gravitationsvektor entgegengerichteten Strömung kann es zur Strömungsablösung nahe der Phasengrenze kommen, die eine wellenartige Eisschicht bewirkt.
    Notes:
    Abstract The effect of mixed convection flow on the shape of the frozen crust in a cooled vertical channel was investigated numerically. For the prediction of the ice-layer thickness a simple numerical model which is based on the boundary layer equations was used. It can be seen that in case of assisting mixed convection flow the heat transfer at the solid crust increases because of inreasing velocity near the solid-liquid interface. On the other hand this increase of the velocity near the solid-liquid interface can lead to flow separation in the core region of the channel because of continuity of mass. By comparing the numerically obtained results for aiding mixed flow with measurements of Campbell and Incropera [10] good agreement can be observed. In case of opposing mixed flow it can be shown that flow separation might occur near the solid-liquid interface. This can result in a wave-like structure of the ice-layer.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses