The stability of magnetohydrodynamic flow in a duct with perfectly conducting walls is investigated in the presence of a homogeneous and constant static magnetic field. The temporal growth and spatial distribution of perturbations are obtained by solving iteratively the direct and adjoint governing equations with respect of perturbations, based on nonmodal stability theory. The effect of the ap...

In analogy with the load and the metage in hydrodynamics, this paper defines magnetohydro-dynamic load and magnetohydrodynamic metage in the case of magnetofluids. They can be used to write the magnetic field in MHD in Clebsch's form. It has been shown herein how these two concepts can be utilised to derive the magnetic analogue of the Ertel's theorem and also, how in the presence of non-trivia...

To investigate large-scale magnetic field generation in highly conducting magnetohydrodynamic (MHD) regimes typical of rotating astrophysical systems, we conduct high-resolution MHD simulations the dynamical regime large Reynolds numbers, turbulence with an inhomogeneous kinetic helicity distribution. We obtain a nonlinear helical dynamo solution, characterized by weak wave slowly propagating o...

The importance of the chromosphere in mass and energy transport within solar atmosphere is now widely recognised. This review discusses physics magnetohydrodynamic (MHD) waves instabilities large-scale chromospheric structures as well magnetic flux tubes. We highlight a number key observational aspects that have helped our understanding role various dynamic processes wave phenomena, heating sce...

This brief review provides an introduction to key ideas in the theory of incompressible magnetohydrodynamic (MHD) turbulence.

Abstract Acoustic wave heating is believed to contribute significantly the missing energy input required maintain solar chromosphere in its observed state. We studied propagation of waves above acoustic cutoff upper photosphere into with ultraviolet and optical spectral observations interpreted through comparison 3D radiative magnetohydrodynamic Bifrost models constrain contribution from atmosp...

The Kelvin–Helmholtz (KH) instability of magnetohydrodynamic surface waves at the low latitude boundary layer is examined using both an eigenfrequency analysis and a time-dependent wave simulation. includes effects sheared flow Alfvén velocity gradient. When magnetosheath flows are perpendicular to ambient magnetic field direction, unstable KH that propagate obliquely direction occur when Mach ...