论文标题
等离子湍流模型中能量转移的局部和全球性能
Local and global properties of energy transfer in models of plasma turbulence
论文作者
论文摘要
使用弱碰撞空间等离子体的直接数值模拟研究了湍流能量传递速率的性质。进行了比较，比较了从混合vlasov-Maxwell模拟无分泌的等离子体，霍尔 - 磁性水力动力学和Landau流体模型的结果，从而再现了低频动力学效应，例如Landau阻尼。在这种部分开发的湍流场景中，使用局部能量转移（LET）获得了不同能量通道的局部和全局缩放特性的估计。这种方法提供了有关能量通量结构的信息，假设湍流级联反传递了大部分能量，然后通过这种等离子体中各种动力学过程以小尺度消散的大部分能量。
The nature of the turbulent energy transfer rate is studied using direct numerical simulations of weakly collisional space plasmas. This is done comparing results obtained from hybrid Vlasov-Maxwell simulations of colissionless plasmas, Hall-magnetohydrodynamics, and Landau fluid models reproducing low-frequency kinetic effects, such as the Landau damping. In this partially developed turbulent scenario, estimates of the local and global scaling properties of different energy channels are obtained using a proxy of the local energy transfer (LET). This approach provides information on the structure of energy fluxes, under the assumption that the turbulent cascade transfers most of the energy that is then dissipated at small scales by various kinetic processes in this kind of plasmas.
