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Acoustic Gravity Waves Produced By Energy Release
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Book Synopsis Acoustic-gravity Waves Produced by Energy Release by : Julian D. Cole
Download or read book Acoustic-gravity Waves Produced by Energy Release written by Julian D. Cole and published by . This book was released on 1968 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: A complete asymptotic analysis is carried out for the flow field produced by the instantaneous release of energy, at a point on the ground, in an isothermal atmosphere. A double integral representation of the flow is constructed from Laplace-Handel transforms of the linearized equations. An asymptotic approximation to the integral is obtained by two successive applications of the method of stationary phase. It is found that there are three principal groups of dispersive waves behind the spherical acoustic front. One of these groups is contained in a high frequency band, and the other two are contained in a low frequency band. The spatial domain of the low frequency waves is cut off by a front (caustic), the location of which is calculated. Some of the characteristics of the flow are discussed. (Author).
Book Synopsis Acoustic-gravity Waves in the Atmosphere by : United States. Environmental Science Services Administration
Download or read book Acoustic-gravity Waves in the Atmosphere written by United States. Environmental Science Services Administration and published by . This book was released on 1968 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Acoustic-gravity Waves in the Atmosphere by : Stanford University. Stanford Electronics Laboratories
Download or read book Acoustic-gravity Waves in the Atmosphere written by Stanford University. Stanford Electronics Laboratories and published by . This book was released on 1965 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this research was to obtain a panoramic view of acoustic-gravity-wave motions throughout the atmosphere. A one-dimensional array of particles and springs, conceived by Newton to study sound waves in the atmosphere, was extended to two dimensions by means of 1500 particles interconnected by springs. Variations of density and pressure with altitude are represented by variations in mass and spring constants. This new model has provided means by which acoustic-gravity-wave motions in the atmosphere are solved on a high-speed digital computer, and a new animated-computer-output technique is used. A motion picture--automatically plotted by the computer, a frame at a time--provides greater detail and perspective of mechanical wave motions in the atmosphere than has ever been obtainable before. Ground-level and 100-km-high explosions were investigated with this computer model, and the resulting transient motions of the atmosphere were displayed by means of a motion picture produced by digital techniques. Computed ground-level barograms resulting from a ground-level explosion compare well with experimental barograms recorded during ground-level nuclear explosions. (Author).
Book Synopsis Acoustic-gravity Waves from an Energy Source at the Ground in an Isothermal Atmosphere by : Julian D. Cole
Download or read book Acoustic-gravity Waves from an Energy Source at the Ground in an Isothermal Atmosphere written by Julian D. Cole and published by . This book was released on 1968 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analysis is given by two different methods--stationary phase and kinematic theory--of the pressure pulse generated by a nuclear explosion near the ground in an isothermal atmosphere. The present study builds upon work reported earlier. The shape of the signal is shown as a function of time at several distances from the source for a fixed altitude, and at several altitudes for a fixed lateral distance. The first signal to arrive at any location is a high-frequency acoustic wave, followed by a low-frequency acoustic-gravity wave. The onset of the latter is marked by a sharp front, or caustic. At any instant after the arrival of the caustic there are three principal frequency components at any location, the lowest of which becomes dominant as time progresses. It is shown how the qualitative features of the flow, as well as the exact location of the caustic, can be obtained from kinematic theory.
Book Synopsis Theoretical Study of the Generation of Infrasonic Waves in the Atmosphere by : Walter E. Knabe
Download or read book Theoretical Study of the Generation of Infrasonic Waves in the Atmosphere written by Walter E. Knabe and published by . This book was released on 1968 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: The generation of acoustic and internal gravity waves in the earth's atmosphere by nuclear detonations is considered. Attention is given to a general statement of the problem and to the assessment of the importance of various generation mechanisms in the flows produced by nuclear explosions. From the significant source mechanisms, the corresponding wave emissions are estimated with reference to nuclear detonation outputs. (Author).
Book Synopsis Acoustic Gravity Waves by : S. I. Hariharan
Download or read book Acoustic Gravity Waves written by S. I. Hariharan and published by . This book was released on 1987 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Conservation and Dissipation of Energy Associated with Atmospheric Acoustic Gravity Waves by : Richard E. DuBroff
Download or read book The Conservation and Dissipation of Energy Associated with Atmospheric Acoustic Gravity Waves written by Richard E. DuBroff and published by . This book was released on 1976 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this report wer consider the relation between the attenuation of acoustic gravity waves in a lossy atmosphere and the corresponding dissipation of the energy associated with the wave induced fluctuations in the atmospheric quantities (e.g. temperature, pressure, density, and velocity). The self consistency between attenuation and energy dissipation is demonstrated for several different types of possible atmospheric energy dissipation processes. This self consistency illustrates the utility of the pseudo energy concept which consists of defining the energy associated with the acoustic gravity waves as a quantity which is both distinguishable from the total energy, and satisfies its own self contained conservation equation. In addition, some experimental evidence is presented which suggests that the gravity waves observed in ionospheric electron content data often correspond to the characteristics of the waves which would, on a theoretical basis, be likely to propagate to ionospheric heights with minimal attenuation.
Book Synopsis Effects of Atmospheric Acoustic Gravity Waves on Electromagnetic Wave Propagations by :
Download or read book Effects of Atmospheric Acoustic Gravity Waves on Electromagnetic Wave Propagations written by and published by . This book was released on 1972 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Acoustic Gravity Waves: A Computational Approach by : S. I. Hariharan
Download or read book Acoustic Gravity Waves: A Computational Approach written by S. I. Hariharan and published by . This book was released on 1987 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Waves in the Atmosphere by : Earl E. Gossard
Download or read book Waves in the Atmosphere written by Earl E. Gossard and published by Elsevier Science & Technology. This book was released on 1975 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT NEUILLY-SUR-SEINE (France) Publisher : ISBN 13 : Total Pages :523 pages Book Rating :4.:/5 (227 download)
Book Synopsis Effects of Atmospheric Acoustic Gravity Waves on Electromagnetic Wave Propagation by : ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT NEUILLY-SUR-SEINE (France)
Download or read book Effects of Atmospheric Acoustic Gravity Waves on Electromagnetic Wave Propagation written by ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT NEUILLY-SUR-SEINE (France) and published by . This book was released on 1972 with total page 523 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the Symposium was to convene Specialists in Physics of the atmosphere engaged in the study of energy transfers in the form of waves in a neutral medium and Specialists in Electromagnetic Wave Propagation concerned with the corresponding modifications of the electric characteristics of the medium and their effects on Electromagnetic Waves. The program has been divided in five sessions: Acoustic gravity waves in the neutral terrestrial atmosphere; Coupling between the ionized atmosphere and the neutral atmosphere disturbed by acoustic gravity waves; Radio electric studies on acoustic gravity waves in the neutral and ionized atmosphere; Influence of acoustic gravity waves on the propagation of electromagnetic waves; Summaries recommendations and future investigations.
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1974 with total page 852 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1987 with total page 956 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effect of Ambient Vibrational Nonequilibrium on the Propagation of Acoustic-gravity Waves by : Jayaraman Srinivasan
Download or read book The Effect of Ambient Vibrational Nonequilibrium on the Propagation of Acoustic-gravity Waves written by Jayaraman Srinivasan and published by . This book was released on 1974 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work is a theoretical study of the effect of ambient vibrational nonequilibrium(vibrational or radiative) on the propagation of acoustic and gravity waves in a gas. In the propagation of such waves, nonequilibrium phenomena can manifest themselves in two distinct ways. This follows from the fact that nonequilibrium can exist in either(or both) the ambient and perturbed states of the gas. It is well known that perturbation nonequilibrium always contribute to damping of the waves. The lesser known effects of ambient nonequilibrium are examined here from the point of view of macroscopic gas dynamics. The physical insight obtained in a one-dimensional analysis is applied to the study of the probable effect of vibrational nonequilibrium(ambient and perturbation) on the propagation of acoustic-gravity waves in Earth's upper atmosphere.
Book Synopsis Acoustic-gravity Waves in the Upper Atmosphere by : Kung C. Yeh
Download or read book Acoustic-gravity Waves in the Upper Atmosphere written by Kung C. Yeh and published by . This book was released on 1974 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this report we review the theory of acoustic-gravity waves, the interaction of such waves with the ionosphere, the experimental support for the existence of such waves in the upper atmosphere, and the role played by acoustic-gravity waves in thermospheric dynamics. After a thorough discussion on the properties of acoustic-gravity waves in an ideal isothermal atmosphere, the effects produced by horizontal winds, sharp boundary discontinuities, and dissipative processes are discussed. These discussions are followed by reviewing propagation effects in a realistic atmosphere for both free waves and guided waves. The propagation of these acoustic-gravity waves in the upper atmosphere may induce changes in the ionosphere sometimes known as traveling disturbances. The existing experimental data on traveling disturbances are then reviewed and found consistent, in most cases, with the acoustic-gravity wave interpretation.
Book Synopsis Selected Rand Abstracts by : Rand Corporation
Download or read book Selected Rand Abstracts written by Rand Corporation and published by . This book was released on 1963 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes Reports (R-series), Rand Memorandums (RM-series), papers (P-series), and Books.
Book Synopsis Library of Congress Catalogs by : Library of Congress
Download or read book Library of Congress Catalogs written by Library of Congress and published by . This book was released on 1976 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt:
