Anomalous energy dissipation of electron current pulses propagating through an inhomogeneous collisionless plasma medium
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The contour plots of the magnetic field in the plane is shown in subplots (a) and (b) (inertialess case) (d) and (e) (full G-EMHD) at two different times. The numbers (−2,0,2) on the axis of these plots show length in units of electron skin depth (corresponding to the low density plasma). The magnetic field profile in at the midplane of the structure in has been depicted at various times in subplots (c) and (f) for inertialess and the full G-EMHD simulations respectively. Subplots (g) and (h) show the inhomogeneous plasma density profile through which the dipolar structure evolves. The cross × and the arrow → marks on these subplots show the initial location of the dipole for inertialess (dipole has no axial velocity in this case) and full G-EMHD simulations.
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Evolution of the total energy of the structure for full G-EMHD simulations, as it propagates through the inhomogeneous plasma density (a) for various grid resolutions (b) for simulations with finite resistivity parameter and (c) with finite viscosity parameter in G-EMHD equations. A thick dashed vertical line shows the time when the dipole enters the inhomogeneous plasma density region.
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