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首页> 外文期刊>Philosophical transactions of the Royal Society. Mathematical, physical, and engineering sciences >Intermittency, nonlinear dynamics and dissipation in the solar wind and astrophysical plasmas
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Intermittency, nonlinear dynamics and dissipation in the solar wind and astrophysical plasmas

机译：太阳风和天体等离子体的间歇性，非线性动力学和耗散

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摘要

An overview is given of important properties of spatial and temporal intermittency, including evidence of its appearance in fluids, magnetofluids and plasmas, and its implications for understanding of heliospheric plasmas. Spatial intermittency is generally associated with formation of sharp gradients and coherent structures. The basic physics of structure generation is ideal, but when dissipation is present it is usually concentrated in regions of strong gradients. This essential feature of spatial intermittency in fluids has been shown recently to carry over to the realm of kinetic plasma, where the dissipation function is not known from first principles. Spatial structures produced in intermittent plasma influence dissipation, heating, and transport and acceleration of charged particles. Temporal intermittency can give rise to very long time correlations or a delayed approach to steady-state conditions, and has been associated with inverse cascade or quasi-inverse cascade systems, with possible implications for heliospheric prediction.
机译：概述了时空间歇性的重要属性，包括其在流体，磁流体和等离子体中的出现及其对理解日层等离子体的影响的证据。空间间歇性通常与尖锐的梯度和相干结构的形成有关。结构生成的基本物理原理是理想的，但是当存在耗散时，它通常集中在强梯度区域中。最近已经显示出流体中空间间断性的这一基本特征可以延续到动力学等离子领域，在该领域中，从第一性原理还不知道其耗散函数。间歇性等离子体中产生的空间结构会影响耗散，加热以及带电粒子的传输和加速。时间间断性可能导致很长的时间相关性或稳态条件的延迟方法，并且已经与反级联或准反级联系统相关联，可能对日球层预测产生影响。

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