HYDROMAGNETIC WAVES IN A COMPRESSIBLE FLUID

Abstract

The equations satisfied by vorticity and current density are derived for a Compressible infinitely conducting fluid in the presence of a magnetic field. It has been shown that the components of vorticity and current density along the direction of the magnetic field will be propagated with Alfven velocity only if the charge separation takes place in the medium. The propagation of the disturbance caused by homogeneous and inhomogeneous condensations at a point in the medium are considered. Finally a proof of Walen's problem, namely an annular disturbance ispropagated along the magnetic lines of force with Alfven velocity without distortion has been given.