Relaxation of plasmas via turbulence is treated by the use of a maximum entropy principle. of Illinois, Urbana Sponsoring Org. The corresponding turbulent energy flux is also found to be sufficient to explain the anomalous heating of fast solar wind.Ma thèse a pour but de comprendre le rôle de la compressibilité dans la turbulence aux basses fréquences dans les plasmas spatiaux (le vent solaire, les plasmas magnétosphériques etc.) The classical Sweet-Parker approach to steady-state magnetic reconnection is extended into the regime of large resistivity (small magnetic Reynolds or Lundquist number) when the aspect ratio between the outflow and inflow scale, delta = d/L, approaches unity. Compressible turbulence in space and astrophysical plasmas : Analytical approach and in-situ data analysis for the solar wind An extension of Sonnerup's model for the magnetic field-line reconnection for a compressible plasma is given. The relaxed states are always stable to ideal modes. The Hansen's vector wave functions have been modified so it could apply directly for the solution of general exterior boundary value problems in compressible plasma for a spherical geometry. The Thermal Instability of a Compressible Hall Plasma. Find many great new & used options and get the best deals for Springer Theses Ser. Therefore whatever is handling the plasma must be able to deal with the high temperatures. The magnetohydrodynamic (MHD) equations with large parallel thermal conductivity and ergodic field lines show that ..integral..vxB is an invariant even with compression. The vector wave functionL has been included to represent an acoustic wave and the three angular orthogonal functions have been defined using complex Fourier series in the azymuthal direction. A proper terminology for the three types of waves involved in an electron plasma is also introduced. As an aside, many turbulence theorists will assume incompressibility for the sake of tractibility in solving equations analytically and this is okay under certain limits similar to how it is okay to approximate the plasma as being cold under under certain limits. Srivastava [14] for the first time attempted to investi-gate the effects of FLR on the RTI of a compressible plasma with exponentially varying density in the ver-tical direction. On physical grounds, one may expect that White2 1 Institute for Nuclear Research, Prospekt Nauky 47, Kyiv 03680, Ukraine 2 Princeton Plasma Physics Laboratory, Princeton, NJ 08543, USA Received 29 October … Simple tools that allow one to identify conditions for the optimum penetration of the SCT into the low beta target plasma have been developed. Dispersion Relation in Compressible Plasma Dispersion Relation in Compressible Plasma Wu, Yung-Kuang 1967-09-01 00:00:00 Electrical Engineering Department, Sou the astern Massachusetts Technological Institute, North Dartmouth, Mass. Actually, dispersion curves are obtained which are inversely related to the wave normal surfaces calculated by Allis, Buchsbaum and Bers (1963). : Univ. Although this density spectrum is suggestive of turbulence, no theory relevant to its interpretation exists. : Originating Research Org. The catch is that in order to get a plasma the gas must be elevated to a really high temperature. Clemmow-Mullaly-Allis type of diagram for the compressible plasma is sketched from these graphs. A source located on the surface will excite the usual creeping-type electromagnetic waves but, because of the compressibility, a strongly trapped surface wave will also be excited. A proper terminology for the three types of waves involved in an electron plasma is also introduced. not identified Sponsoring Org. The analysis of a compressible plasma which is contained in a waveguide of general cross-section is presented. compressible plasma medium bounded by a convex rigid surface. The hydromagnetic stability of an electrically conducting compressible plasma having variable density in the vertical direction has been investigated taking into account the effects of Hallcurrents. Lutsenko1 and R.B. Full Record; Other Related Research; Authors: Balmain, K G Publication Date: Thu Apr 01 00:00:00 EST 1965 Research Org. Learn more. Actually, dispersion curves are obtained which are inversely related to the wave normal surfaces calculated by Allis, Buchsbaum and Bers (1963). The relaxed states are always stable to ideal modes. ). Compressible Plasma. The solution is shown to be characterized by a variational principle. The theory of resistive dissipation of linear compressible modes in a nonuniform plasma is presented in a unified way, following a normal mode approach. A compressible model, based on augmented Lagrangian, Large Eddy Simulation (LES) turbulence modeling and Volume of Fluid (VOF) approaches, capable of managing incompressible two-phase flows as well as turbulent compressible motions is presented. … The latter is solved rigorously in terms of a hyperelliptic integral. Rapid reconnection in compressible plasma Martin F. Heyna) Institut fu ¨r Theoretische Physik, Technische Universitat Graz, Petersgasse 16, A-8010 Graz, Austria Vladimir S. Semenov Institute of Physics, State University St. Petersburg, St. Petergof 198904, Russia ~Received 4 … Even so, the slow mode (i.e., the low frequency extension of the ion acoustic wave) and fast mode fluctuations are compressible. 1 Part I. James R. Wait Contribution From the Central Radio Propagation Laboratory, National Bureau of Standards, Boulder, Colo. (Received May 20, 1964) Radiation from a fini te source in a compressible electron plasma is con~idered. Authors: R. C. Sharma. Fishbone modes in compressible plasmas Ya.I. Free shipping for many products! The Voyager and Pioneer Spacecraft have detected large-scale quasi-periodic plasma fluctuations in the outer heliosphere beyond 20 AU. : USDOE OSTI Identifier: 4603670 NSA Number: NSA-19-029404 IMPEDANCE OF A SHORT DIPOLE IN A COMPRESSIBLE PLASMA. Taylor's theory of field reversal is extended to finite pressure plasmas and given a rigorous support by using symmetries in the equations to determine preferred conservation laws. 02747, U.S.A. (Received February 13, 1967; revised April24, 1967) The Maxwell-Euler equations are reformulated through linear operator and generalized … This is equivalent to solving the compressible case in hydrodynamics for the neutral fluid. 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