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  • Articles  (23)
  • Physics  (23)
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  • Articles  (23)
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  • 1
    Electronic Resource
    Electronic Resource
    Mathematical conversion kit (1978)
    [s.l.] : Nature Publishing Group
    Nature 271 (1978), S. 286-286 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] ALTHOUGH the general tradition of mathematics departments in the US had been rather specialised towards pure mathematics, the best American universities have recognised for many years now the need for Applied Mathematics Programs. These have been aimed, especially, at helping those who, although ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/271286a0
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The Earth's fluid envelope (1983)
    [s.l.] : Nature Publishing Group
    Nature 302 (1983), S. 733-734 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] FOR THE earth sciences as a whole, the ap-pearance of Adrian Gill's book is an event of very special importance. It is the first work to give comprehensive and mutually integrated descriptions of the atmosphere and ocean, those two complex and in-timately interacting dynamical systems that modify ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/302733a0
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  • 3
    Electronic Resource
    Electronic Resource
    Fluid Mechanics of Tropical Cyclones (1998)
    Springer
    Theoretical and computational fluid dynamics 10 (1998), S. 3-21 
    Details
    ISSN: 1432-2250
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract: Typhoons in the northwest Pacific and hurricanes in the northeast Atlantic are particular instances of a global phenomenon with frequently disastrous consequences known as the Tropical Cyclone (TC). This is an intense cyclone, generated over a tropical ocean with kinetic energy 1018 J or more, which extends over several hundred kilometres and yet is above all characterized by its calm central region: “the eye of the storm”. In a TC (not, of course, to be confused with such completely different phenomena as tornadoes) both the energy input and its dissipation mainly occur within that boundary layer between air and ocean which, at high TC wind speeds of 50–60 m/s, comprises essentially “a third fluid”: ocean spray. Afterwards, as a TC reaches land, disastrous effects of several different kinds may occur, and this paper outlines how fluid mechanics contributes towards worldwide struggles to reduce the human impact of TC disasters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001620050048
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    The inaugural theodorsen lecture (1994)
    Springer
    Theoretical and computational fluid dynamics 6 (1994), S. 261-280 
    Details
    ISSN: 1432-2250
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The lecture begins by sketching some of the background to contemporary jet aeroacoustics. Then it reviews scaling laws for noise generation by low-Mach-number airflows and by turbulence convected at “not-so-low” Mach numbers. These laws take into account the influence of Doppler effects associated with the convection of aeroacoustic sources. Next, a uniformly valid Doppler-effect approximation exhibits the transition, with increasing Mach number of convection, from compact-source radiation at low Mach numbers to a statistical assemblage of conical shock waves radiated by eddies convected at supersonic speed. In jets, for example, supersonic eddy convection is typically found for jet exit speeds exceeding twice the atmospheric speed of sound. The lecture continues by describing a new dynamical theory of the nonlinear propagation of such statistically random assemblages of conical shock waves. It is shown, both by a general theoretical analysis and by an illustrative computational study, how their propagation is dominated by a characteristic “bunching” process. That process—associated with a tendency for shock waves that have already formed unions with other shock waves to acquire an increased proneness to form further unions—acts so as to enhance the high-frequency part of the spectrum of noise emission from jets at these high exit speeds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00311841
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  • 5
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    An Informal Introduction to Theoretical Fluid Mechanics (1988)
    American Institute of Physics
    Details
    Publication Date: 1988-06-01
    Print ISSN: 0031-9228
    Electronic ISSN: 1945-0699
    Topics: Physics
    Published by American Institute of Physics
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  • 6
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    The inaugural theodorsen lecture (1994)
    Springer
    Details
    Publication Date: 1994-10-01
    Print ISSN: 0935-4964
    Electronic ISSN: 1432-2250
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Published by Springer
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  • 7
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    Fluid Mechanics of Tropical Cyclones (1998)
    Springer
    Details
    Publication Date: 1998-01-01
    Print ISSN: 0935-4964
    Electronic ISSN: 1432-2250
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Published by Springer
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  • 8
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    Waves in Fluids (2002)
    Institute of Physics
    Details
    Publication Date: 2002-08-14
    Print ISSN: 0957-0233
    Electronic ISSN: 1361-6501
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Published by Institute of Physics
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  • 9
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    A simple fluid-flow model of ground effect on hovering (1979)
    Cambridge University Press
    Details
    Publication Date: 1979-08-01
    Description: Hoverming motions, by which an animal (or a helicopter) in stationary fluid generates a downflow to support its weight, entail energy costs that include the induced power (power supplied to that downflow). The simplest classical model for induced power is the actuator-disk model. This paper shows how a relatively insignificant modification can be made to that model to make it aerodynamically self-consistent. The modified simple model of the downflow may be evaluated in fluid that either is unbounded or is bounded below by horizontal ground. Comparison of the calculated induced powers in the two cases (even though made in this paper not for the true axisymmetric flow patterns but for the corresponding two-dimensional flow patterns) appears to give a more satisfactory analysis than was previously available of the observed reduction of induced power associated with proximity to the ground. © 1979, Cambridge University Press
    Print ISSN: 0022-1120
    Electronic ISSN: 1469-7645
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Published by Cambridge University Press
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  • 10
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    Two-dimensional analyses related to wave-energy extraction by submerged resonant ducts (1979)
    Cambridge University Press
    Details
    Publication Date: 1979-03-23
    Description: Submerged resonant ducts offer an approach to the design of wave-energy extraction devices consistent with the need for maximum seaworthiness. This paper gives a full account of one type of analysis of these systems, based upon two-dimensional wave hydrodynamics and linearized duct dynamics. The mathematical analyses are given in detail in § 2 while § 1 describes as concisely as possible (i) the assumptions underlying each analysis, (ii) its results and their implications for design, and (iii) any available experimental comparisons. One theoretical prediction, unexpected when it was first made but since confirmed by experiment (Knott & Flower 1979), is that the effective pressure fluctuations to which a resonant duct responds can be substantially greater than those that would be present at the level of the duct mouth if the duct were absent. Other important predictions are concerned with added mass, radiation damping and the conditions for optimum energy extraction, calculated below for a wide variety of mouth design configurations and internal duct geometries. Broad tentative conclusions from the analyses are given at the end of § 1. © 1979, Cambridge University Press. All rights reserved.
    Print ISSN: 0022-1120
    Electronic ISSN: 1469-7645
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Published by Cambridge University Press
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