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  • 1
    Electronic Resource
    Electronic Resource
    Self-regulating finite-difference methods for the computation of reacting flows with nonlinear kinetics (1988)
    Springer
    Journal of scientific computing 3 (1988), S. 165-187 
    Details
    ISSN: 1573-7691
    Keywords: Finite differences ; split operators ; reacting flow
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract This paper deals with the difficult problem of predicting the concentration (and temperature) fields of reacting flows in which the chemistry is modeled by a multicomponent set ofnonlinear reactions. A novel variable split-operator method is presented, which splits each individual chemical reaction at each point and for each step or iteration in such a way as to guarantee the nonpositiveness of the eigenvalues of the chemical Jacobian matrix. This helps to ensure stability/convergence of the proposed iterative scheme. The possibility of constructing accelerated schemes of this nature is also explored. Finally, computed results illustrate the usefulness and reliability of the proposed methods and provide evidence concerning their relative merits.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01061256
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Vibrations of axially compressed laminated orthotropic cylindrical shells, including transverse shear deformation (1980)
    Springer
    Acta mechanica 37 (1980), S. 13-28 
    Details
    ISSN: 1619-6937
    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 Es werden die freien Schwingungen, das Beulen und der Einfluß einer Anfangsvorspannung auf das Frequenzspektrum orthotroper, kompositer, zylindrischer Schalen im Rahmen einer Theorie, die die Querschubverformung mitberücksichtigt, untersucht. Die erhaltenen Resultate werden mit den Vorhersagen der verbesserten Loveschen Theorie und der vereinfachten Donnellschen Theorie, welche keine Querschubverformung in Betrach ziehen, verglichen. Die durchgerechneten Beispiele zeigen, daß die Querschubverformung nicht nur für kurze, komposite Schalen sondern sogar für längere Schalen mit niederem Schubmodul Bedeutung gewinnen kann.
    Notes: Summary The free vibrations, buckling and the effect of initial prestress upon the frequency spectrum of orthotropic composite cylindrical shells are examined in the context of a theory that includes transverse shear deformation. Results obtained are compared with the predictions of refined Love-type theory and simplified Donnell-type theory that do not consider shear deformation. The calculated examples indicate that transverse shear deformation can be significant not only for short composite shells but even for longer shells possessing low shear moduli.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01441240
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Buckling and vibration of orthotropic composite cylindrical shells (1980)
    Springer
    Acta mechanica 36 (1980), S. 15-29 
    Details
    ISSN: 1619-6937
    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 Die Schwingungsantwort kompositer, orthotroper, zylindrischer Schalen unter achsialem Druck wird untersucht, wobei eine verfeinerte Lovesche Theorie verwendet wird. Die so gefundenen Ergebnisse werden mit denen nach der Donnell-Typ-Theorie, die der Literatur ent-nommen wurden, verglichen. Wichtige Effekte zufolge der Schichtung der Schale, deren Länge zu Radius und Radius zu Wandstärke Verhältnis und Austauschung der Faserrichtung werden für einige zwei- und dreischichtige Schalen den Berechnungen entnommen.
    Notes: Summary The vibrational response of orthotropic composite cylindrical shells subjected to axial compression is examined, following a refined Love-type theory. Results obtained are compared with those predicted by Donnell-type theory, as found in the literature. Important effects due to shell lay-up, length to radius ratio, radius to thickness ratio and fiber reversal are noted from the calculations performed for a number of double and triple-layered shells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01178233
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    A new, reliable family of split-operator methods for computing reacting flows (1984)
    Chichester : Wiley-Blackwell
    International Journal for Numerical Methods in Fluids 4 (1984), S. 653-666 
    Details
    ISSN: 0271-2091
    Keywords: Finite Differences ; Split Operators ; Reacting Flow ; Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A new, reliable family of split-operator methods is presented for the computation of reacting flows. The methods may be inconsistent or consistent depending upon their applicability. Analyses are carried out for flow combusting according to general multicomponent, multireaction linear or non-linear chemical kinetic models, and conditions for guaranteed stability/convergence are established. A special chemical splitting parameter can also be embedded in the methods enabling accelerated convergence of an iterative finite-difference solution. Computed results highlight the capabilities and properties of the methods.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/fld.1650040705
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    Paper (German National Licenses)
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