Monopole drift-wave vortices in a viscous magnetized plasma

Monopole nonlinear drift-wave vortices in a viscous magnetized plasma are investigated by applying a time-dependent finite element method of two-dimensional space to Hasegawa-Mima equation with viscosity term. Under a periodic boundary condition in the direction of drift-wave propagation and a natural boundary condition transverse to the propagation, the monopole drift-wave vortices of positive potential tilt in the clockwise direction. The tilting angle depends on the value of initial localized potential. (author)