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arXiv 1202.4265physics.comp-phastro-ph.EPastro-ph.SRphysics.plasm-ph
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磁化等离子体Vlasov模拟的三维多矩平流格式

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

Takashi Minoshima, Yosuke Matsumoto, Takanobu Amano

摘要:

我们提出了多矩平流方案的扩展(Minoshima等人,2011,J. Comput.物理)三维的情况下,磁化等离子体的全电磁弗拉索夫模拟。该格式不仅将轮廓的点值作为因变量,而且将轮廓的零阶至二阶分段矩作为因变量,并在其控制方程的基础上对其进行改进。与二维格式类似,三维格式可以精确地求解高斯型廓线的固体转动问题,且数值色散和扩散很小。这对于磁化等离子体的Vlasov模拟是一个非常重要的性质。我们将该方案应用于电磁Vlasov模拟。成功地模拟了线性波的传播和电子温度各向异性不稳定性的非线性演化,并具有较好的能量守恒精度。

英文摘要:

We present an extension of the multi-moment advection scheme (Minoshima et al., 2011, J. Comput. Phys.) to the three-dimensional case, for full electromagnetic Vlasov simulations of magnetized plasma. The scheme treats not only point values of a profile but also its zeroth to second order piecewise moments as dependent variables, and advances them on the basis of their governing equations. Similar to the two-dimensional scheme, the three-dimensional scheme can accurately solve the solid body rotation problem of a gaussian profile with little numerical dispersion or diffusion. This is a very important property for Vlasov simulations of magnetized plasma. We apply the scheme to electromagnetic Vlasov simulations. Propagation of linear waves and nonlinear evolution of the electron temperature anisotropy instability are successfully simulated with a good accuracy of the energy conservation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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