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  • 1960-1964  (1)
  • 1950-1954  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für angewandte Mathematik und Physik 5 (1954), S. 36-49 
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Notes: Summary Following a synopsis on film- and drop-condensation, one deals with condensation on an uneven surface. The surface tensions give rise to very great pressure gradients because of the different curvatures of the surface of the condensate. The action of the latter can amount to a multiple (up to a few powers with basis ten) of the value corresponding to the gravitation. Large gradients of pressure produce thin films of condensate, and according to the theory ofNusselt they lead to large coefficients of heat transmission. Heat transfer coefficients are given determined with calculus of finite differences for a condenser with vertical tubes, grooves parallel to the tube axis and given geometrical form. The latter are confirmed by tests. Adimensional numbers determinate theNusselt number.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 36 (1964), S. 261-268 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Es werden im folgenden zwei Probleme aus dem Gebiet der Wärmetauscher mit Phasenänderung behandelt. Das erste Problem betrifft ein hydraulisches Analogieverfahren, das erlaubt, den Einfluß des Druckverlustes der Dampfströmung an den wärmeübertragenden Elementen auf die Wärmeübertragung in einem Kondensator für niedergespannten Dampf zu bestimmen. Sodann wird eine wirtschaftlich interessante Möglichkeit diskutiert, den Irreversibilitätsgrad bei der Wärmeübertragung zu verringern, wobei das Heiz- bzw. Kühlmittel keine Phasenänderung erfährt.
    Additional Material: 16 Ill.
    Type of Medium: Electronic Resource
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