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  • 1
    Electronic Resource
    Electronic Resource
    Laminar-turbulent transition in polymer solutions (1977)
    [s.l.] : Nature Publishing Group
    Nature 270 (1977), S. 508-509 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Following the work of Brennen6, an ogival-shaped head with an axial length of 3i inches and a base diameter of 2.34 inches was tested in the Naval Academy free-surface water tunnel. The head shape corresponds to a source distribution, cut off sharply and supported by a long sting through which air ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/270508a0
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  • 2
    Electronic Resource
    Electronic Resource
    Measurement of tensile strength of liquids by an explosion technique (1975)
    [s.l.] : Nature Publishing Group
    Nature 253 (1975), S. 723-725 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1 Experimental set up for measuring liquid tensile strength by explosion technique. Fig. 2 Measured spray-dome velocity as a function of explosion depth. o, Water; O, glycerine. The experimental equipment is shown in Fig. I, where the latter stage of a test is pictured. A small electrically ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/253723a0
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Turbulent-flow Properties of Deoxyribonucleic Acid Solutions (1966)
    [s.l.] : Nature Publishing Group
    Nature 211 (1966), S. 170-171 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] An apparatus for* measuring the turbulent-flow properties of fluid samples, based on the change in pressure loss due to pipe friction compared with that of distilled water, was used for the DNA tests2'3. This instrument gives an indication of the friction-reducing properties of high polymer ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/211170a0
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  • 4
    Electronic Resource
    Electronic Resource
    High molecular weight algal substances in the sea (1970)
    Springer
    Marine biology 7 (1970), S. 93-99 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Phytoplankton exudates into culture media and extracts from littoral algae are shown to contain significant quantities of extracellular materials having molecular weights in excess of 50,000. A recent development in experimental fluid mechanics (the reduction of turbulent friction coefficients of flowing solutions by dissolved macromolecules) has been utilized as a specific test for high molecular weight compounds. Phytoplankton species in all major algal groups could be found which exude high molecular weight compounds into their culture media; the red alga Porphyridium cruentum typically produced friction reductions as high as 60%. Seaweed samples in the Chlorophyta, Phaeophyta, and Rhodophyta showed major changes in turbulent friction coefficient; in some cases the friction was less than 1/2 that of pure seawater. All samples of the genus Porphyra and Gigartina produced substantial friction changes. From these experiments it is concluded that algal exudates can be a prominent source of high molecular weight compounds in the sea.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00354912
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  • 5
    Electronic Resource
    Electronic Resource
    “Negative roughness” and polymer drag reduction (1991)
    Springer
    Experiments in fluids 11 (1991), S. 142-146 
    Details
    ISSN: 1432-1114
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Based on an analogy to the Colebrook-White equation, a technique has been developed to allow polymer-solution extrapolation or “scaling” from one pipe size to another at constant values of ΔB. Each experimental data point can be transferred to a new pipe size by a simple, pocket-calculator method which preserves the experimental value of ΔB exactly. Thus scaling can be easily accomplished, without resorting to iteration or graphical techniques. The “negative-roughness” idea can also explain the loss of ΔB or drag reduction with increasing flow velocity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00190290
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    A comparison of tracer and PIV results in visualizing water flow around a cylinder close to the free surface (2000)
    Springer
    Experiments in fluids 28 (2000), S. 261-265 
    Details
    ISSN: 1432-1114
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract  Sheridan et al. (1997) have recently published particle-image-velocimetry (PIV) results showing water flow patterns around a cylinder at various values of shallow immersion. These results have been compared with a turbulent-flow tracer study of some of the same flow configurations. In shallow-immersion cylinder comparison tests, the streaklines of the tracer technique offer a virtually identical impression of the principal flow characteristics when compared with the PIV velocity vectors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003480050386
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Water jet photography — techniques and methods (1983)
    Springer
    Experiments in fluids 1 (1983), S. 113-120 
    Details
    ISSN: 1432-1114
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Cameras and lighting techniques which allow photographs to be taken of such water jet flow details as surface waves, transition, and spray eruption, as well as the various jet instability mechanisms, are described. While originally developed for very specialized cameras, many of the techniques can be adapted to conventional cameras. and other areas of research.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00272009
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    A turbulent-flow dye-streak technique (1995)
    Springer
    Experiments in fluids 20 (1995), S. 38-41 
    Details
    ISSN: 1432-1114
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A new formulation of shear-thickening and high extensional-viscosity fluids is used to suspend white pigment to form a dye streak which resists breakup in turbulent and complex separated flows. Examples from flow around cylinders at Reynolds numbers to 30 000, and in a turbulent boundary layer, show the capability of the technique.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00190596
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  • 9
    Electronic Resource
    Electronic Resource
    Scale effects in polymer solution pipe flow (1993)
    Springer
    Experiments in fluids 15 (1993), S. 70-74 
    Details
    ISSN: 1432-1114
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Satisfactory scaling from laboratory-scale pipe-flow data to large industrial pipelines is an area of practical concern in the utilization of drag-reducing polymer solutions. From experimental data for pipes 0.0254 m in diameter and above, it is shown that accurate scaling can be obtained using a simple, pocket-calculator method. However, pipes of say, 0.005 m and smaller provide much less accurate scaling data for larger pipes. A detailed study of the velocity profiles in drag-reducing flow indicates a total lack of similarity of the profiles of the very small pipes compared with the larger.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00195598
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    Turbulent spots in kerosene (1989)
    Springer
    Experiments in fluids 7 (1989), S. 286-287 
    Details
    ISSN: 1432-1114
    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/10.1007/BF00198010
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