We study the dynamics of r-modes in the ocean of a magnetic neutron star. We modeled the star’s ocean with a spherical rotating thin shell and assumed that the magnetic field symmetry axis is not aligned to the shell’s spin axis. In the magnetohydrodynamic approximation, we calculate the frequency of ` = m rmodes in the shell of an incompressible fluid. Different r-modes with ` and `±2 are coup...

We study the topological susceptibility and fourth cumulant of QCD vacuum in presence a uniform, background magnetic field two-and-three flavor finding novel, model-independent sum rules relating shift due to quark condensates, shifts condensates susceptibilities.

We study the ?-vacuum of QCD using two-flavor chiral perturbation theory (?PT) in presence a uniform, background magnetic field calculating field-dependent free energy density, topological susceptibility and fourth cumulant at one-loop order. find that is enhanced by while diminished weak fields larger when ?=0. However, vacuum with ??0, can be either monotonically or relative to their values. ...

in this research ideal magnetohydrodynamics equations (mhd) has been solved in a channel of quasi one dimensional plasma flow. magnetohydrodynamics equations, including continuity, momentum, energy and induced magnetic field equations are with the respect of the gauss magnetic condition. the implemented numerical solution is based on harten, lax, vanleer (hlld) discontinuities solution methods....

Entropy generation due to viscous incompressible MHD forced convective dissipative fluid flow through a horizontal channel of finite depth in the existence of an inclined magnetic field and heat source effect has been examined. The governing non-linear partial differential equations for momentum, energy and entropy generation are derived and solved by using the analytical method. In addition; t...

As was already observed experimentally, the erosion of tungsten (W) coated graphite (C) tiles in ASDEX-Upgrade exhibit regular erosion patterns on the m rough surfaces who’s origin is not fully understood: Surfaces inclined towards the magnetic field direction show strong net W erosion while surfaces facing away from the magnetic field are shadowed from erosion and may even exhibit net W deposi...

In the present paper, we have studied MHD free convective two dimensional unsteady viscous incompressible flows through a porous effect bounded by an infinite vertical porous plate with constant suction. The permeability of the porous medium fluctuates in time about a constant mean, and the viscosity of fluid is assumed to vary as a linear function of temperature. The flow is permitted under th...