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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 27 (1985), S. 0 
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The occurrences of 18 species of rare or little-known marine fishes in the Thames area are reported. Random dispersal at a pelagic larval or post-larval stage of development, when movements of fishes can be influenced by currents and tides, may explain the presence of several species. Many of the oceanic or lithophilous species considered in the report could only have originated from the Atlantic Ocean or the western Channel and probably entered the Thames Estuary having moved through the Straits of Dover, but one species is presumed to be vagrant from the northern North Sea. Information provided in the text suggests that two species probably should not be included under the ‘rare’ category which hitherto has been used to describe their status in the Thames Estuary. It is likely that the ‘rare’ categorization arose because the species involved were until recently subject to taxonomic confusion with related species.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 2 (1990), S. 922-927 
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A simple experiment to study the mixing of two different density fluids by the Rayleigh–Taylor instability has been performed. Several experiments are reported for nominally one-dimensional homogeneous mixing and for experiments characterized by a large two-dimensional motion superimposed on the mixing process. The one-dimensional experiments show a plane mixing region that expands by Rayleigh–Taylor instabilities. The two-dimensional experiments show a contraction in the width of the mixing interface that is a result of the stretching action of the large-scale motion. Image analysis techniques have been developed to provide quantitative measurements for use in a "two-fluid'' model of the mixing phenomena.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 2 (1988), S. 0 
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Chichester : Wiley-Blackwell
    International Journal for Numerical Methods in Fluids 21 (1995), S. 205-222 
    ISSN: 0271-2091
    Keywords: two-phase ; Van Leer ; convective transport ; volume fractions ; momentum ; interface tracking ; 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: The Van Leer method for the computation of convective fluxes is extended to two-phase flow. By preventing spurious undershoots and overshoots, the scheme preserves physical realism while maintaining high-order accuracy. This is particulary important for two-phase flows, since phase exchange terms are typically a function of volume fraction products and numerical diffusion can incorrectly mix the two phases. The scheme described here is constructed to guarantee that the sum of the volume fractions is always unity and that the volume fractions are always greater than or equal to zero. Various test problems are computed to demonstrate the accuracy of the method and to show how the scheme might be incorporated in existing computational methods. In addition to multiphase flow applications, setting equal phase velocities results in a volume marker scheme that is well suited to single-phase interface tracking problems.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
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