Investigating flow patterns and related dynamics in multi-instability turbulent plasmas using a three-point cross-phase time delay estimation velocimetry scheme
Investigating flow patterns and related dynamics in multi-instability turbulent plasmas using a three-point cross-phase time delay estimation velocimetry scheme
复制标题
使用三点跨相时间延迟估计测速方案研究多不稳定湍流等离子体中的流动模式和相关动力学
DOI：
10.1063/1.4945629
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发表时间：
2016
影响因子：
2.2
通讯作者：
G. Tynan
中科院分区：
文献类型：
--
作者：
C. Brandt;S. C. Thakur;G. Tynan
利用一种新的时延估计测速方法研究了圆柱形磁化螺旋等离子体方位截面内流型的复杂性及其动力学特性。这种方法的优点是能够计算复杂时空数据中传播的波状结构和模式的时间平均2D速度场。它能够区分和可视化同时存在的叠加纠缠动力学的细节，并且它可以应用于表现出频繁重复模式的类流体系统（例如，等离子体中的波、流体中的波、行星大气中的动力学等）。速度计算是基于时间序列的交叉相位分析获得的时间延迟估计。每个速度矢量是明确地计算从三个时间序列测量在三个不同的非共线空间点。当应用于快速成像时，这种方法对于理解丰富的...
Complexities of flow patterns in the azimuthal cross-section of a cylindrical magnetized helicon plasma and the corresponding plasma dynamics are investigated by means of a novel scheme for time delay estimation velocimetry. The advantage of this introduced method is the capability of calculating the time-averaged 2D velocity fields of propagating wave-like structures and patterns in complex spatiotemporal data. It is able to distinguish and visualize the details of simultaneously present superimposed entangled dynamics and it can be applied to fluid-like systems exhibiting frequently repeating patterns (e.g., waves in plasmas, waves in fluids, dynamics in planetary atmospheres, etc.). The velocity calculations are based on time delay estimation obtained from cross-phase analysis of time series. Each velocity vector is unambiguously calculated from three time series measured at three different non-collinear spatial points. This method, when applied to fast imaging, has been crucial to understand the rich ...
影响因子：
8.6
作者：
Fujisawa, A;Itoh, K;Diamond, PH
通讯作者：
Diamond, PH