Effect of ion-parallel viscosity on the propagation of surface waves on an interface

Summary form only given, as follows. The behaviour of MHD surface waves propagating at a single interface is studied by incorporating viscous dissipation via the strongly anisotropic parallel viscosity term. We consider incompressible, linear, MHD equations with a strong background magnetic field. Applying boundary condition at the interface i.e. continuity of normal velocity and the total pressure across the interface, the dispersion relation is obtained for the surface waves. It is then solved numerically and characteristic curves are plotted different values of propagating angle. It is found that modes of surface waves become damped owing to ion-parallel viscosity. The pattern of propagation shown graphically. It is conjectured then solved numerically and characteristic curves are plotted that the results are applicable for the situation in solarwind at 1 AU for values obtained from spacecraft data.