Journal ArticleDOI
The physics of twisted magnetic tubes rising in a stratified medium: two dimensional results
TLDR
In this article, the physics of a twisted magnetic flux tube rising in a stratified medium is studied using a numerical MHD code, and the problem considered is fully compressible (no Boussinesq approximation), includes ohmic resistivity, and is two dimensional, i.e., there is no variation of the variables in the direction of the tube axis.Abstract:
The physics of a twisted magnetic flux tube rising in a stratified medium is studied using a numerical MHD code. The problem considered is fully compressible (no Boussinesq approximation), includes ohmic resistivity, and is two dimensional, i.e., there is no variation of the variables in the direction of the tube axis. We study a high plasma beta case with small ratio of radius to external pressure scaleheight. The results obtained can therefore be of relevance to understand the transport of magnetic flux across the solar convection zone.read more
Citations
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Journal ArticleDOI
Solar Flares: Magnetohydrodynamic Processes
Kazunari Shibata,Tetsuya Magara +1 more
TL;DR: The current understanding of solar flares, mainly focused on magnetohydrodynamic (MHD) processes responsible for producing a flare, can be found in this article, where the authors present a review of the models proposed to explain the physical mechanism of flares, giving an comprehensive explanation of the key processes.
Journal ArticleDOI
Formation of Torus-Unstable Flux Ropes and Electric Currents in Erupting Sigmoids
TL;DR: In this article, a zero-β magnetohydrodynamic (MHD) simulation of an initially potential, asymmetric bipolar field, which evolves by means of simultaneous slow magnetic field diffusion and sub-Alfvenic, line-tied shearing motions in the photosphere, is used to analyze the physical mechanisms that form a three-dimensional coronal flux rope and later cause its eruption.
Journal ArticleDOI
Coronal mass ejections, magnetic flux ropes, and solar magnetism
TL;DR: A review on coronal mass ejections (CMEs) treats hydromagnetic issues posed by observations, in order to relate CMEs to flares and prominence eruptions and to consider the roles these processes play in the evolution of the solar corona in the course of an 11-year cycle as discussed by the authors.
Journal ArticleDOI
Emergence of magnetic flux from the convection zone into the corona
Vasilis Archontis,Fernando Moreno-Insertis,Fernando Moreno-Insertis,K. Galsgaard,K. Galsgaard,A. W. Hood,E. O'Shea +6 more
TL;DR: In this paper, the authors used idealized models for the initial stratification and magnetic field distribution below the photosphere similar to those used for multidimensional flux emergence experiments in the literature.
Journal ArticleDOI
Resistive Emergence of Undulatory Flux Tubes
Etienne Pariat,Guillaume Aulanier,B. Schmieder,B. Schmieder,Manolis K. Georgoulis,David M. Rust,Pietro N. Bernasconi +6 more
TL;DR: In this article, a linear force-free field extrapolation of one of the magnetograms was performed to study the magnetic topology of small-scale EBs and their possible role in the flux emergence process, and it was found that 23 out of 47 EBs are cospatial with bald patches (BPs), while 15 are located at the footpoints of very flat separatrix field lines passing through distant BPs.
References
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An Introduction to Fluid Dynamics
TL;DR: The dynamique des : fluides Reference Record created on 2005-11-18 is updated on 2016-08-08 and shows improvements in the quality of the data over the past decade.
Journal ArticleDOI
An Introduction to Fluid Dynamics. By G. K. Batchelor. Pp. 615. 75s. (Cambridge.)
TL;DR: In this paper, the Navier-Stokes equation is derived for an inviscid fluid, and a finite difference method is proposed to solve the Euler's equations for a fluid flow in 3D space.
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Journal ArticleDOI
Cosmical magnetic fields
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Dynamics of Drop Deformation and Breakup in Viscous Fluids
TL;DR: In this article, the dynamics of drop deformation and breakup in viscous flows at low Reynolds numbers are described. And a short discussion is given of the stability of the shapes of translating drops, and the effects of flow and material parameters on the drop size distribution are summarized.
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