We analyze 3D numerical simulations of driven incompressible magnetohydrodynamic (MHD) turbulence in a periodic box threaded by a moderately strong external magnetic field. We find that the time scale for the energy cascade is consistent with the Goldreich-Sridhar model of strong MHD turbulence. Using higher order longitudinal structure functions we show that the turbulent motions in the plane ...

We investigate hydromagnetic turbulence of primordial magnetic fields using magnetohydrodynamics ~MHD! in an expanding universe. We present the basic, covariant MHD equations, find solutions for MHD waves in the early universe, and investigate the equations numerically for random magnetic fields in two spatial dimensions. We find the formation of magnetic structures at larger and larger scales ...

Some observations suggest that solar spicules show small amplitude and high frequency oscillations of magneto-acoustic waves, which arise from photospheric granular forcing. We apply the method of MHD seismology to determine the period of kink waves. For this purposes, the oscillations of a magnetic cylinder embedded in a field-free environment is investigated. Finally, diagnostic diagrams disp...

Shock wave refraction at a sharp density interface is classical problem in hydrodynamics. Presently, we investigate the strongly planar of magnetohydrodynamic (MHD) shock an inclined interface. A magnetic field applied that initially oriented either perpendicular or parallel to motion incident shock. We explore flow structure by varying magnitude governed non-dimensional parameter [Formula: see...

Context. GRS 1915+105 being one of the brightest transient black hole binaries (BHBs) in X-rays offers a unique testbed for study connection between accretion and ejection mechanisms BHBs. In particular, this source can be used to disc wind its dependence on state changes Aims. Our aim is investigate origin geometry 1915+105. This will provide basis planning future observations with X-ray Imagi...

In this report, we address several aspects of the approximation of the MHD equations by a Galerkin Discontinuous finite volume schemes. This work has been initiated during a CEMRACS project in July and August 2008 in Luminy. The project was entitled GADMHD (for GAlerkin Discontinuous approximation for the Magneto-Hydro-Dynamics). It has been supported by the INRIA CALVI project. 1 Some properti...

Abstract the metal component arc plasma at muzzle of railgun is simulated by magneto-hydro-dynamic(MHD) model, and flow field under interaction between armature jet during movement position modeled simulated. The sheath model considered in simulation near movement. According to calculation results MHD transient current curve through analyzed, based on results, electromagnetic armature-arc-rail ...