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3 edition of Excitation of turbulence by density waves found in the catalog.

Excitation of turbulence by density waves

Excitation of turbulence by density waves

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Published by National Aeronautics and Space Administration, Scientific and Technical Information Branch, For sale by the National Technical Information Service] in [Washington, D.C.?], [Springfield, Va .
Written in English

    Subjects:
  • Atmospheric turbulence -- Mathematical models,
  • Turbulence -- Mathematical models

  • Edition Notes

    StatementC.M. Tchen
    SeriesNASA contractor report -- 3905, NASA contractor report -- NASA CR-3905
    ContributionsUnited States. National Aeronautics and Space Administration. Scientific and Technical Information Branch
    The Physical Object
    FormatMicroform
    Paginationiii, 55 p.
    Number of Pages55
    ID Numbers
    Open LibraryOL14984710M

    Low frequency (O(10 Hz–10 kHz)) vibration excitation of capillary waves has been extensively studied for nearly two centuries. Such waves appear at the excitation frequency or at rational multiples of the excitation frequency through nonlinear coupling as a result of the finite displacement of the wave, most often at one-half the excitation frequency in so-called Faraday waves and twice this. random functions and turbulence Download random functions and turbulence or read online books in PDF, EPUB, Tuebl, and Mobi Format. Click Download or Read Online button to get random functions and turbulence book now. This site is like a library, Use search box in the widget to get ebook that you want.

      Wave turbulence (WT) occurs in systems of strongly interacting nonlinear waves and can lead to energy flows across length and frequency scales much like those that are well known in vortex turbulence. Typically, the energy passes although a nondissipative inertial range until it reaches a small enough scale that viscosity becomes important and terminates the cascade by dissipating the .   Coherent drift modes and drift wave turbulence are studied in a collisionality dominated high-density helicon plasma. The drift wave instability is identified by comparison of the.

    Abstract. The excitation of electrostatic turbulence inside space-observed solitary structures is a central topic of this exposition. Three representative solitary structures observed in the topside auroral ionosphere as large-amplitude nonlinear signatures in the electric field and magnetic-field-aligned current on the transverse scales of ∼10{sup 2}–10{sup 3} m are evaluated by the. Main notions and ideas of wave (weak) turbulence theory are explained with the help of Hamiltonian approach to wave dynamics, and are applied to waves in RSW model. Derivation of kinetic equations under random-phase approximation is explained. Short inertia–gravity waves on the f plane, short equatorial inertia–gravity waves, and Rossby waves on the beta plane are then considered along.


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Excitation of turbulence by density waves Download PDF EPUB FB2

Get this from a library. Excitation of turbulence by density waves. [C M Tchen; United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch.]. Benielli, J. Sommeria / Dynamics of Atmospheres and Oceans 23 () range is beyond the internal wave frequency domain, and the fluctuations must therefore be attributed to turbulence or to the transport of fine-scale density structures by the wave motion.

Actual turbulence is not very active in our system, and it is quite Cited by:   We study and elucidate the mechanism of spiral density wave excitation in a differentially rotating flow with turbulence which could result from the magneto-rotational instability.

We formulate a set of wave equations with sources that are only non-zero in the presence of turbulent fluctuations.

We solve these in a shearing box domain, subject to the boundary conditions of periodicity in Cited by: Wave Turbulence Under Parametric Excitation by Victor S.

L'Vov,available at Book Depository with free Behavior of Parametrically Excited Waves Beyond the Threshold.- Consistent Nonlinear Theory for Parametric Excitation of Waves.- Spectral Density of Parametrically Excited Waves.- Structure of the.

The possibility that the collapse of a long coherent Langmuir wave is suppressed by the effect of acoustic turbulence is demonstrated.

The local depletion of the plasma density caused by the pondermotive force of the lone coherent Langmuir wave makes the parametric instability possible, and leads to the excitation of the turbulent ion acoustic waves and turbulent plasma waves which are Author: Ken Kogiso, Mitsuo Kono, Nobuo Yajima.

density waves with short wavelength in the direction of the shear if the disc model were to have signi cant thermal Excitation of turbulence by density waves book cation (Ogilvie & Lubow ). Shearing coordinates In the theory of linear wave excitation developed in Heine-mann & Papaloizou (a,b) the coordinate dependence of the asymptotic form of the excited waves at late.

A session entitled “Nature of Turbulence, Dissipation, and Heating in Space Plasmas: From Alfvén Waves to Kinetic Alfvén Waves ” was held as a part of the twelfth Asia Oceania Geosciences Society Annual Meeting, which took place in Singapore between 2 and 7 August This special section is organized based on the session.

Field-aligned density striation is one of the most common inhomogeneity phenomena in magneto-plasmas, such as in the solar coronal plasma and terrestrial auroral plasma. Kinetic Alfvén waves (KAWs) can play an important role in the inhomogeneous heating of coronal magneto-plasmas as well as in the local acceleration of auroral energetic electrons.

The results can be explained in the context of virtual electro16,17,18,19,In the bidomain representation, the voltage in cardiac tissue is the potential drop between the intracellular. The interaction of turbulence and shock waves is considered self-consistently so that the back-reaction of the turbulence and its associated reaction on the turbulence is addressed.

This approach differs from previous studies which considered the interaction of linear modes with a shock. The most basic model of hypersonic flow, described by the inviscid form of Burgers’ equation, is used.

Excitation of turbulence by density waves. By C. Tichen. Abstract. A nonlinear system describes the microdynamical state of turbulence that is excited by density waves. It consists of an equation of propagation and a master equation.

A group-scaling generates the scaled equations of many interacting groups of distribution functions. WAVE TURBULENCE is a state of a system of many simultaneously excited and interacting waves characterized by an energy distribution which is not in any sense close to thermodynamic equilibrium.

Such situations in a choppy sea, in a hot plasma, in dielectrics under arise, for example, a powerful laser beam, in magnets placed in a strong.

An ionospheric heater, or an ionospheric HF pump facility, is a powerful radio wave transmitter with an array of antennas which is used for research of plasma turbulence, the ionosphere and upper atmosphere. These transmitters operate in the high frequency (HF) range ( MHz) at which radio waves are reflected from the ionosphere back to the ground.

Kelvin waves (kelvons), the distortion waves on vortex lines, play a key part in the relaxation of superfluid turbulence at low temperatures. We present a weak-turbulence theory of kelvons. The wave-number spectrum of the turbulence is found to exhibit an inverse cascade to form an iso- tropic, two-dimensional Kolmogorov spectrum, k/sup -3/, in the large--wave-number regime.

A session entitled “Nature of Turbulence, Dissipation, and Heating in Space Plasmas: From Alfvén Waves to Kinetic Alfvén Waves” was held as a part of the twelfth Asia Oceania Geosciences Society Annual Meeting, which took place in Singapore between 2 and 7 August This special section is organized based on the session.

Providing a systematic and self-contained treatment of excitation, propagation and re- emission of electromagnetic waves guided by density ducts in magnetized plasmas, this book describes in detail the theoretical basis of the electrodynamics of ducts. The excitation of spiral density waves through turbulent fluctuations in accretion discs II: Numerical Simulations with MRI driven turbulence By T.

Heinemann and J. Papaloizou No static citation data No static citation data Cite. Wave Turbulence Under Parametric Excitation Applications to Magnets With 69 Figures Nonlinear Theory of Parametric wave Excitation at Finite Temperatures Spectral Density of Parametrically Excited Waves Structure of the Distribution Function in k-Space.

Nonlinear Spin Waves, Nauka, Moscow, Kolmogorov Spectra of Turbulence - Wave Turbulence Wave Turbulence Under Parametric Excitation - Application to Magnets. The excitation of a new type of plasma turbulence consisting of a collection of neighboring localized electric fields of high intensity is investigated.

The individual localized fields that constitute the spiky turbulence oscillate at frequencies close to the electron plasma frequency, and their localization is attributed to wave‐trapping inside the self‐consistent density cavities. Nevertheless, there are other processes and approaches that will be developed in Section Turbulence is, therefore, produced by the interaction of the fluid with geometry, by the loss of energy due to viscosity, by density variations caused by temperature, or other factors, such as changes in speed, or all of these at once.

Moreover, excitation by turbulence in the mixed layer could constitute an important source of internal waves in the deep ocean.

A similar process also occurs in the atmospheric mixed layer bounded above by a stable air mass and could be important for the rise of atmospheric inver- sions by solar heating (Willis and Deardorff, ; Linden, ).