SELF-ORGANIZED AND CHAOTIC STATES IN NONUNIFORM DUSTY MAGNETOPLASMAS WITH SHEARED FLOWS

It is well known that sheared plasma flows can be built up both in ast rophysical environments as well as in laboratory dusty plasmas. Our ob jective here is to understand the coupling of velocity gradient energy to electrostatic and electromagnetic waves in nonuniform dusty magnet oplasma. For this purpose, we employ the multi-fluid dusty plasma mode l and derive the relevant nonlinear equations for low-frequency (in co mparison with the ion gyrofrequency) waves in the presence of sheared plasma hows. Linear dispersion relations are derived and analyzed. It is found that both the electrostatic and electromagnetic waves are dri ven by sheared plasma flows. Furthermore, the newly derived mode coupl ing equations provide the possibility of self-organized and chaotic st ates in dusty plasmas. The results of our investigation should be help ful in understanding the properties of dusty plasma microturbulence wh en sources and sinks are simultaneously present.