离子-电子碰撞对非局部离子热传导、粘性应力和扩散的影响
Impact of ion-electron collisions on nonlocal ion heat conduction, viscous stress, and diffusion
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中文总结 AI 辅助
研究离子-电子碰撞对强非均匀等离子体中离子输运的影响，采用第一性原理简化动力学方法，发现其显著改变非局部热流峰值并强烈抑制非局部预热。
中文摘要 AI 辅助
通过应用第一性原理简化动力学方法，本研究展示了离子-电子碰撞对非局部区域强非均匀等离子体中离子输运的影响，该区域因陡峭梯度导致碰撞性不足以维持局部热平衡。考虑了未磁化和磁化等离子体中的离子热传导及粘性应力，以及多物种等离子体中的物种间扩散。尤其发现，即使离子和电子温度相等，离子-电子碰撞也会显著改变非局部热流峰值，且非局部预热被强烈抑制。
英文摘要
By applying a first-principles reduced kinetic method, this work demonstrates the impact of ion-electron collisions on ion transport for strongly inhomogeneous plasmas in the nonlocal regime, where collisionality is insufficient to enforce local thermal equilibrium due to sharp gradients. Ion heat conduction and viscous stress in both unmagnetized and magnetized plasmas are considered, as well as inter-species diffusion in multi-species plasmas. Most notably, even for equal ion and electron temperatures, ion-electron collisions are found to substantially modify the peak nonlocal heat flow, whereas nonlocal preheats are strongly suppressed since streaming suprathermal particles are further out in the tail of the cold ion distribution where ion-electron collisions become dominant.
