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  • 1
    Digitale Medien
    Digitale Medien
    The effect of three-dimensionality on a laminarizing boundary layer (1995)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 7 (1995), S. 1782-1784 
    Details
    ISSN: 1089-7666
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Measurements of highly accelerated turbulent boundary layers with and without mean cross-flow are presented and compared. The accelerated mean longitudinal velocity profiles suggest that the Reynolds shear stress, u'v', is greater in the two-dimensional case than in the three-dimensional case. The measured normal longitudinal Reynolds stress, u'u', is greater in the three-dimensional accelerated boundary layer case. The measurements indicate that the Reynolds stress tensor components decouple in the three-dimensional case; hence, the three-dimensionality alters the characteristic of nondecoupling observed in highly accelerated two-dimensional boundary layers. © 1995 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.868493
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  • 2
    Digitale Medien
    Digitale Medien
    The effect of small particles on fluid turbulence in a flat-plate, turbulent boundary layer in air (1991)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 3 (1991), S. 928-937 
    Details
    ISSN: 1089-7666
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: This paper describes the result of both an experimental and an analytical investigation of the response of a two-dimensional, turbulent boundary layer in air to the presence of particles. Copper shot, 70 μm in diameter, were uniformly introduced into a vertical boundary layer, at a momentum thickness Reynolds number of about 1000. The particle mass flux was set at 20% of the fluid mass flux, and all measurements were made using a single-component, forward-scatter laser Doppler anemometer. The measurements clearly demonstrated that the particles damped fluid turbulence, apparently affecting all scales equally. The measurements further showed a strong correlation between the degree of damping and the particle concentration in the log region of the boundary layer.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.857969
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  • 3
    Digitale Medien
    Digitale Medien
    Toxicity of Azo-Compounds and Other Substances to the Fruit Tree Red Spider Mite (1948)
    [s.l.] : Nature Publishing Group
    Nature 161 (1948), S. 644-645 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] LITTLE is known of the susceptibility to synthetic organic substances of the summer stages of the fruit tree red spider mite, Metatetranychus ulmi (Koch) (syn. Paratetranychus pilosus C. and F.), although recent work on this pest1, and on the related mite Tetranychus telarius ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/161644a0
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  • 4
    Digitale Medien
    Digitale Medien
    A high-resolution laser Doppler anemometer for three-dimensional turbulent boundary layers (1996)
    Springer
    Experiments in fluids 22 (1996), S. 111-117 
    Details
    ISSN: 1432-1114
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract  A new laser Doppler anemometer optimized for high spatial resolution near a wall is described. The instrument uses short focal length optics, a mirror probe in the flow, and side-scatter collection to produce a measuring volume 35 μm in diameter by 66 μm long. Data are presented for a two-dimensional boundary layer, demonstrating the instrument’s ability to measure Reynolds shear stresses as close to the wall as 0.1 mm, or y +≈3.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s003480050028
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  • 5
    Digitale Medien
    Digitale Medien
    Development of a portable laser sheet (1987)
    Springer
    Experiments in fluids 5 (1987), S. 215-216 
    Details
    ISSN: 1432-1114
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract A portable laser sheet illumination source for flow visualization experiments has been developed utilizing fiber optic cable and standard optical bench components. This technique improves the convenience and safety aspects of using laser light by containing the concentrated laser energy inside a flexible and shielded fiber cable. Transmission efficiencies up to seventy-five percent have been obtained with a twenty meter long fiber cable and careful alignment of optical components. The current optical configuration can transmit a two-watt Argon-ion laser beam and produce a sheet one-half by one meter in size and approximately two to three millimeters in thickness.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00298466
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  • 6
    Digitale Medien
    Digitale Medien
    An experimental study of the effects of three-dimensionality on the near wall turbulence structures using flow visualization (1996)
    Springer
    Experiments in fluids 20 (1996), S. 266-272 
    Details
    ISSN: 1432-1114
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract The effects of three-dimensionality on the turbulence producing near-wall structures over a rotating disk are examined using hydrogen bubble visualization. Laser Doppler anemometry measurements of the tangential and radial velocities indicate the flow to resemble that of an “infinite” disk. It was found that the crossflow acts to reduce vertical mixing during the turbulence ejection events, thus reducing the efficiency of the boundary layer in producing shear stress.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00192671
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  • 7
    Digitale Medien
    Digitale Medien
    Letters to the editor (1985)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 31 (1985), S. 1231-1232 
    Details
    ISSN: 0001-1541
    Schlagwort(e): Chemistry ; Chemical Engineering
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/aic.690310725
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