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  • Articles: DFG German National Licenses  (4)
  • 2005-2009
  • 1995-1999  (4)
  • 1998  (4)
Source
  • Articles: DFG German National Licenses  (4)
Material
Years
  • 2005-2009
  • 1995-1999  (4)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Natural convection between coaxial vertical cylinders partially filled with a porous material (1998)
    Springer
    Forschung im Ingenieurwesen 64 (1998), S. 157-162 
    Details
    ISSN: 1434-0860
    Source: Springer Online Journal Archives 1860-2000
    Topics: Technology
    Description / Table of Contents: Zusammenfassung In diesem Artikel wird die laminare, voll entwickelte freie Konvektion zwischen zwei vertikalen, koaxialen Zylindern dargestellt. Der Raum zwischen diesen beiden Zylindern, welche unterschiedliche Temperaturen aufweisen, ist teilweise mit einem porösen Medium gefüllt. Das Brinkmann-Darcy-Modell wird zur Berechnung des Impulstransports im Bereisch des porösen Mediums verwendet. Diese beiden Bereiche werden über die Gleichheit der Geschwindigkeit und die Randbedingung des Scherspannungssprunges an der Grenzfläche gekoppelt. Der Einfluß der Darcyzahl auf die Geschwindigkeiten im gesamten porösen Bereich und auf den anpassbaren Koeffizienten der Bedingung des Scherspannungsprunges wird aufgezeigt.
    Notes: Abstract This paper presents laminar fully developed free convection flow between two coaxial vertical cylinders partially filled with a porous matrix when the cylinders are kept at different temperatures. The Brinkman-extended Darcy model is used to simulate momentum transfer in the porous region. The two regions are coupled by equating the velocity and by considering shear stress jump condition at the interface. The effect of Darcy number on the velocity throughout porous domain and adjustable coefficient in the stress jump condition at the interface is shown graphically. It is observed that velocity is influenced by the shear stress jump condition at the interface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00010772
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Free-convection between vertical walls partially filled with porous medium (1998)
    Springer
    Heat and mass transfer 33 (1998), S. 515-519 
    Details
    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
    Notes: Abstract This paper presents an analytical study of laminar fully developed free-convection flow between two vertical walls partially filled with porous matrix and partially with a clear fluid having interface vertically. The momentum transfer in porous medium is described by the Brinkman-extended Darcy model and the two regions are coupled by equating the velocity and shear stress at the interface. The governing equations having non-linear nature have been solved by using perturbation method. It has been found that effect of Brinkman term is in entire porous domain for large values of Darcy number while its effect is confined nearer to interface and wall for small values of Darcy number.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002310050223
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Low Cycle Fatigue Behavior of an ( + β) Titanium Alloy (1998)
    Springer
    Journal of materials science 17 (1998), S. 993-997 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006605918112
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Microanalyses of uranium in Indian soil samples using solid state nuclear track detection technique (1998)
    Springer
    Journal of radioanalytical and nuclear chemistry 238 (1998), S. 21-24 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Uranium content of soil samples collected from different states of India, namely Uttar Prades, Rajasthan and Kerala has been estimated. The areas cover the normal background area, high background area and dumpyards of fertilizer factory and thermal power plant. Plastic sheets were used as a detector for the registration of fission tracks resulting from the (n, f) reaction on235U present in the sample due to the thermal neutrons from a nuclear reactor. The uranium concentration has been found to vary from 0.24 to 9.20 μg/g in various soil samples. Higher levels of uranium were found in the vicinity of a coal fired power plant. The present results may be useful for the radiation hygiene.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02385350
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    Paper (German National Licenses)
    Fulltext
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