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Monday, May 11, 2020 | History

2 edition of Magnetohydrodynamic simulation of a streamer beside a realistic coronal hole found in the catalog.

Magnetohydrodynamic simulation of a streamer beside a realistic coronal hole

Magnetohydrodynamic simulation of a streamer beside a realistic coronal hole

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  • 7 Currently reading

Published by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, D.C, Springfield, Va .
Written in English

    Subjects:
  • Coronal holes.,
  • Magnetohydrodynamic flow.,
  • Solar corona.

  • Edition Notes

    StatementS.T. Suess ... [et al.].
    SeriesNASA-TM -- 112098., NASA technical memorandum -- 112098.
    ContributionsSuess, Steven T., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15498419M

    Magnetohydrodynamics (MHD), also called magnetofluid mechanics, or hydromagnetics, the description of the behaviour of a plasma (q.v.), or, in general, any electrically conducting fluid in the presence of electric and magnetic fields. A plasma can be defined in terms of its constituents, using equations to describe the behaviour of the electrons, ions, neutral particles, etc. magnetohydrodynamics (măgnē'tōhī'drōdīnăm`ĭks), study of the motions of electrically conducting fluids and their interactions with magnetic principles of magnetohydrodynamics are of particular importance in plasma plasma, in physics, fully ionized gas of low density, containing approximately equal numbers of positive and negative ions (see electron and ion).

    Recent observations have revealed that MHD waves and oscillations are ubiquitous in the solar atmosphere, with a wide range of periods. We give a brief review of some aspects of MHD waves and coronal seismology which have recently been the focus of intense debate or are newly emerging. The MHD model: The ideal MHD equations (3) • Couplingbetween system described by {E,B}and system described by {ρ,p} comes about through equations involving the velocity v(r,t) of the fluid: ‘Newton’s’ equation of motion for a fluid element describes the acceleration of a fluidFile Size: KB.

    This thesis is concerned with developing a simulation tool based on the magnetohydrodynamic (MHD) description of plasmas and employing it for studying the characteristics of large-scale waves and shocks launched into the solar corona by the lift-off of a solar eruption such as a coronal mass ejection (CME). Nonlinear evolution of a trans-Alfvenic shock wave (TASW), at which the flow velocity passes over the Alfven velocity, is computed in a magnetohydrodynamic approximation. The analytical theory suggests that an infinitesimal perturbation of a TASW results in its disintegration, i.e., finite variation of the flow, or transformation into some.


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Magnetohydrodynamic simulation of a streamer beside a realistic coronal hole Download PDF EPUB FB2

Existing models of coronal streamers establish their credibility and act as the initial state for transients. The models have produced satisfactory streamer simulations, but unsatisfactory coronal hole simulations. This is a consequence of the character of the models and the boundary conditions. The models all have higher densities in the magnetically open regions than occur in coronal holes Cited by: 2.

NASA-TM MAGNETOHYDRODYNAMIC SIMULATION OF A STREAMER BESIDE A REALISTIC CORONAL HOLE S. SUESS Space Science Laboratory, NASA Marshall Space Flight Center Huntsville, Alabama U.S.A. WU, A.-H. WANG Center for Space Plasma and Aeronomic Research The University o/ Alabama in Huntsville, Huntsville, Alabama and G.

The models have produced satisfactory streamer simulations, but unsatisfactory coronal hole simulations. This is a consequence of the character of the models and the boundary conditions.

The models all have higher densities in the magnetically open Cited by: 2. Get this from a library. Magnetohydrodynamic simulation of a streamer beside a realistic coronal hole.

[Steven T Suess; United States. National Aeronautics and Space Administration.;]. sible that coronal hole jets also are the source of such waves detected in the interplanetary medium (Gosling et al. ; Marubashi et al. In this paper, we analyze a first-principles, 3D numerical simulation of the initiation and propa-gation of a coronal hole jet (Karpen et al.

) to establish and characterize its turbulent na-ture. Coronal mass ejections (CMEs) are the most important drivers of various types of space weather disturbance. Here we report a newly developed magnetohydrodynamic (MHD) simulation of the solar wind, including a series of multiple CMEs with internal spheromak‐type magnetic by: S.

Wu, Yufen Zhou, Chaowei Jiang, Xueshang Feng, Chin‐Chun Wu and Qiang Hu, A data‐constrained three‐dimensional magnetohydrodynamic simulation model for a coronal mass ejection initiation, Journal of Geophysical Research: Space Physics,2, (), ().

Magnetohydrodynamic Simulation of a Streamer Beside a Realistic Coronal Hole. Pages Profiles Above the Limb in A Coronal Hole. Pages Hassler, D. (et al.) Book Title Mass Supply and Flows in the Solar Corona Book Subtitle The 2nd SOHO Workshop Editors. Magnetohydrodynamic Simulation of a Streamer Beside a Realistic Coronal Hole.- Manifestation of Magnetic Reconnection in Coronal Streamer Current Sheets.- Coronal Magnetic Field Evolution under Reconnective Relaxation possibilities for realistic modeling even further.

Third, the sophistication of the models themselves, both in their geo-metrical realism and the physics that has been included, has matured significantly. The application of magnetohydrodynamic ~MHD. coro-nal models to these solar observations has begun to exploit this confluence of capabilities.

Magnetohydrodynamic simulation is carried out for the NOAA AR in the time span t ∈ {, } UT on December 5; covering events of a blowout jet and a C flare. The application of supercomputers and advanced numerical techniques to problems of coronal structure and dynamics is described.

Numerical methods appr Cited by: The Magnetohydrodynamic Drive Is Real—and You Can Build One All you need is a battery, a magnet, and some wires to build your own quasi-fictional submarine drive.

Facebook. Magnetohydrodynamics (MHD; also magneto-fluid dynamics or hydro­magnetics) is the study of the magnetic properties and behaviour of electrically conducting es of such magneto­fluids include plasmas, liquid metals, salt water, and word "magneto­hydro­dynamics" is derived from magneto-meaning magnetic field, hydro-meaning water, and dynamics meaning movement.

A CONSISTENT TREATMENT OF THERMALLY CONDUCTIVE MAGNETOHYDRODYNAMIC FLOWS IN HELMET-STREAMER CORONAL STRUCTURES S. Cuperman,*'** T.

Detman,* C. Bruma** and M. Dryer* * Space Environment Laboratory, ERL, NOAA, Boulder, COU.S.A. ** Raymond and Beverly Sackler, Faculty of Exact Sciences, School of Physics and Astronomy, Tel Aviv Author: S. Cuperman, S. Cuperman, T.R. Detman, C. Bruma, M. Dryer. We performed a magnetohydrodynamic simulation of a formation process of coronal mass ejections (CMEs), focusing on the interaction (reconnection) between an ejecting flux rope and its ambient field.

We examined three cases with different ambient fields: one had no ambient field, while the other two had dipole fields with opposite directions.

A three-dimensional magnetohydrodynamic model of the global solar corona is described. The model uses observed photospheric magnetic fields as a boundary condition.

A version of the model with a polytropic energy equation is used to interpret solar observations, including eclipse images of the corona, Ulysses spacecraft measurements of the interplanetary magnetic field, and coronal hole Cited by: Coronal mass ejections (CMEs) are large, episodic eruptions of coronal plasma and magnetic flux that are ejected out into the heliosphere at speeds typically1 ranging from –km s−1.

They are of great interest both for their central role in extreme space weather 2, 3 and in the solar cycle evolution of the coronal magnetic field 4, 5. InFile Size: 2MB. A magnetohydrodynamic pumping mechanism was proposed by Bellan [Phys. Plas ()] to explain the formation of highly collimated plasma-filled magnetic flux tubes in certain solar coronal loop simulation experiments.

In this paper, measurements on such an experiment are compared to the predictions of Bellan’s pumping and collimation by: 6. Other articles where Magnetohydrodynamic wave is discussed: ionosphere and magnetosphere: Magnetosphere: caused by the production of magnetohydrodynamic shock waves, which in turn are caused by high-velocity solar wind particles.

Ahead of this bow shock boundary, toward the Sun, is the undisturbed solar wind. Coronal Transverse Magnetohydrodynamic Waves in a Solar Prominence Article (PDF Available) in Science () January with 62 Reads How we measure 'reads'.among successive coronal mass ejections. Citation: Xiong, M., H.

Zheng, and S. Wang (), Magnetohydrodynamic simulation of the interaction between two interplanetary magnetic clouds and its consequent geoeffectiveness: 2. A magnetohydrodynamic simulation of a magnetized plasma at high conductivity shows that, whereas the magnetic flux can be considered ‘frozen’ into the medium for .