标题： 一种改进的磁化等离子体非局部电子热输运模型 显示英文标题

标题： An improved nonlocal electron heat transport model for magnetized plasmas

摘要： 由强烈温度梯度驱动的电子分布函数的畸变对惯性约束聚变条件下等离子体中热流和磁场的生成与演化起着关键作用。在大时空尺度上描述这种动力学行为通常需要基于简化Vlasov-Fokker-Planck方程的多组模型。然而，现有多组模型的准确性仍不确定，缺乏实现非局域磁场修正的明确方法。本文开发了一个改进的磁化等离子体非局域多组模型。改进包括：(i) 扩散方程中的修正源项，(ii) 包含密度扰动的产生Biermann电场方程，以及(iii) Nernst速度的非局域修正方法。分析了各向异性热传导方程的数值方法，并通过三个测试案例证明该模型能够准确预测磁化等离子体中由非局域效应产生的关键现象。 显示英文摘要

摘要： Distortions in the electron distribution function driven by intense temperature gradients critically influence the generation and evolution of heat flux and magnetic fields in plasmas under the condition of inertial confinement fusion. Describing such kinetic behaviors at large spatiotemporal scales typically requires multigroup models based on simplified Vlasov-Fokker-Planck equations. However, the accuracy of existing multigroup models remains uncertain, without a well-defined methodology for implementing nonlocal magnetic field corrections. This paper develops an improved nonlocal multigroup model for magnetized plasmas. The advancements comprise: (i) a revised source term in the diffusion equations, (ii) a Biermann-producing electric field equation incorporating the density perturbation, and (iii) a nonlocal correction method for the Nernst velocity. The numerical method for the anisotropic heat conduction equation is analyzed, and three test cases demonstrate that the model accurately predicts the key phenomena arising from nonlocal effects in magnetized plasmas.