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Multi-moment advection scheme in three dimension for Vlasov simulations of magnetized plasma

机译:Vlasov模拟的三维多力矩平流方案   磁化等离子体

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摘要

We present an extension of the multi-moment advection scheme (Minoshima etal., 2011, J. Comput. Phys.) to the three-dimensional case, for fullelectromagnetic Vlasov simulations of magnetized plasma. The scheme treats notonly point values of a profile but also its zeroth to second order piecewisemoments as dependent variables, and advances them on the basis of theirgoverning equations. Similar to the two-dimensional scheme, thethree-dimensional scheme can accurately solve the solid body rotation problemof a gaussian profile with little numerical dispersion or diffusion. This is avery important property for Vlasov simulations of magnetized plasma. We applythe scheme to electromagnetic Vlasov simulations. Propagation of linear wavesand nonlinear evolution of the electron temperature anisotropy instability aresuccessfully simulated with a good accuracy of the energy conservation.
机译:我们提出了多矩对流方案的扩展(Minoshima等人,2011,J。Comput。Phys。)到三维情况,用于磁化等离子体的全电磁Vlasov模拟。该方案不仅将轮廓的点值而且还将其零阶至二阶分段矩都视为因变量,并根据其控制方程式对其进行处理。类似于二维方案,三维方案可以精确地解决高斯轮廓的固体旋转问题,而数值分散或扩散很少。对于磁化等离子体的Vlasov模拟,这是非常重要的属性。我们将该方案应用于电磁Vlasov仿真。成功地模拟了线性波的传播和电子温度各向异性的不稳定性的非线性演化,并具有良好的能量守恒精度。

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