Detailed descriptionThis projects deals with two-dimensional hybrid simulations of Kelvin-Helmholtz instability in magnetized plasma. Hybrid simulations treat ions as individual macroparticles and electrons as massless, charge-neutralizing fluid. In contrast to fluid models, the hybrid model thus includes ion kinetics which may significantly affect dynamics of the instability.
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Projects |
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Hybrid-KH1 Hybrid simulation of Kelvin-Helmholtz instability under velocity shear dv=v_A where v_A is Alfven velocity. There are two velocity shears in the simulation. The shears are not equivalent because of direction of convective electric field. This configuration thus in fact models the flow of plasma around magnetosphere at dawn and dusk sides within one simulation. See paper by Henri et al., Phys. Plasmas 20, 102118 (2013), doi: 10.1063/1.4826214 for more information about the simulation setup and analysis of data. Available products: B, Bx, By, Bz, ni, E, Ex, Ey, Ez, U, Ux, Uy, Uz |
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CoordinatesAxis X is perpendicular to shear axis; axis Y is parallel to shear axis. Basic unit of length is ion inertial length d_i. The shear scale in these units is L=3d_i. |
Initial conditionsPlasma conditions in (background) plasma are as follows: Magnetic field is almost exclusively out-of-plane with small component in the direction of shear axis: B=(0.0,0.05,0.99875) in simulation units. Plasma flow ouside the shear is sub-Alfvenic, vy=0.5v_A. Proton kinetic to magnetic pressure ratio is beta_p=0.5. There are two shears in order to apply periodic boundary conditions. |
ParametersGrid size: Nx=1536, Ny=512; Time step: dt=0.01 in units of inversed proton gyrofrequency. System size: Lx = 180; Ly = 30pi. Shear scale L = 3d_i where d_i is ion inertial length. |
Simulation presets
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Products in simulation
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