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  • 1
    Publication Date: 1987-09-01
    Print ISSN: 0042-9929
    Electronic ISSN: 1432-1181
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Published by Springer
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Heat and mass transfer 21 (1987), S. 283-290 
    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 Es wird die stationäre laminare freie Konvektion in einem zylindrischen Behälter dreidimensional simuliert, der ein Fluid hoher Prandtl-Zahl enthält, das mit punktförmigen oder linienförmigen Wärmequellen beheizt ist. Die Bestimmungsgleichungen in einfachen Variablen und vereinfacht mit der Boussinesq-Approximation werden gelöst und unter Verwendung eines segregierten numerischen Verfahrens mit gleitender Schrittweite. Die diskretisierte Gleichung für die Druckkorrektur, welche die Kontinuitäts- und die Impulsgleichung verknüpft, wird unter Verwendung einer Multigrid-Methode gelöst. Es werden Strömungs- und Temperaturfelder für verschiedene Wärmequellendichten, Längen und Positionen sowie für verschiedene Wärmeübergangskoeffizienten an den Berandungen des Behälters vorhergesagt. Der Einfluß dieser Variablen auf das thermische und hydrodynamische Verhalten im Tank werden präsentiert und analysiert.
    Notes: Abstract Steady laminar free convection in cylindrical tanks containing high Prandtl number fluids, heated with localized point or line heat sources, is simulated in three dimensions. The governing system of equations in primitive variables, simplified with the Boussinesq approximation is solved using a segregated numerical formulation with skewed time-like marching procedure. The discretized pressure correction equation, which links the continuity and momentum equations is solved using a multigrid method. Flow and temperature fields are predicted for a variety of heat source strengths, lengths and locations and heat transfer coefficients at the convective boundaries. The effects of these variables on the thermal and hydrodynamic conditions in the tank are presented and analysed.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 30 (1990), S. 629-646 
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: This paper describes the use of field and zone modelling techniques in studying the behaviour of LPG tanks when subjected to accidental fire conditions. The field modelling approach is used to determine the free convective flows and heat transfer in both the vapour and the liquid regions, and also the heat transfer through the tank wall. Zone modelling techniques are employed to calculate the fire heat flux and the radiation heat transfer from the vapour wetted wall to the liquid/vapour interface. The model is verified by comparing predicted results with full scale experimental data obtained by the Health and Safety Executive, U.K.1 The comparisons indicate that the model can accurately predict the tank pressure and time to first valve opening. The model is used to investigate the effect of fire exposure level on the tank behaviour.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
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