论文标题
压力 - 应变相互作用：iii。磁重新连接的粒子模拟
Pressure-Strain Interaction: III. Particle-in-Cell Simulations of Magnetic Reconnection
论文作者
论文摘要
在弱碰撞和无碰撞血浆过程（例如磁重新连接和等离子体湍流）中，能量如何转化为热能。压力 - 应变相互作用已成为重要的部分，因为它描述了散装流量和热能密度之间的转换率。在两项伴侣研究中，我们提出了压力应变相互作用的替代分解，以隔离收敛/分化流量和流动剪切的影响，而不是可压缩和不可压缩的流动，我们得出了磁场与坐标的压力应变相互作用。在这里，我们使用这些结果来研究二维抗平行磁重新连接期间的压力应变相互作用。我们执行粒子中的模拟，并在笛卡尔和磁场对齐的坐标中绘制分解。我们确定了在重新连接过程中导致正压应变相互作用的机制。这项研究提供了一个解释压力 - 应变相互作用的数值和观察数据的路线图，这对于重新连接，湍流和无碰撞冲击的研究应该很重要。
How energy is converted into thermal energy in weakly collisional and collisionless plasma processes such as magnetic reconnection and plasma turbulence has recently been the subject of intense scrutiny. The pressure-strain interaction has emerged as an important piece, as it describes the rate of conversion between bulk flow and thermal energy density. In two companion studies, we presented an alternate decomposition of the pressure-strain interaction to isolate the effects of converging/diverging flow and flow shear instead of compressible and incompressible flow, and we derived the pressure-strain interaction in magnetic field-aligned coordinates. Here, we use these results to study pressure-strain interaction during two-dimensional anti-parallel magnetic reconnection. We perform particle-in-cell simulations and plot the decompositions in both Cartesian and magnetic field-aligned coordinates. We identify the mechanisms contributing to positive and negative pressure-strain interaction during reconnection. This study provides a roadmap for interpreting numerical and observational data of the pressure-strain interaction, which should be important for studies of reconnection, turbulence, and collisionless shocks.
