On the Statistical Properties of the Turbulent Reynolds Stress
On the Statistical Properties of the Turbulent Reynolds Stress
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湍流雷诺应力的统计特性
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
M. Umeda
中科院分区：
文献类型：
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作者：
M. Umeda
提交给美国物理学会关于湍流雷诺应力统计特性的DPP 07会议ZHENG YAN，乔治泰南，JONATHAN YU，CHRIS HOLLAND，STEFAN MULLER，MIN XU，能源研究中心-在CSDX线性装置上研究了湍流雷诺应力的统计特性。湍流雷诺应力的最强功率位于最大密度梯度区域附近，并且湍流径向速度场和方位角速度场之间的交叉相位决定了雷诺应力的形状和幅度，从而决定了剪切流的产生。湍流离子饱和流的PDF表明密度爆发发生在剪切层附近。计算了湍流离子饱和流、湍流径向速度场和方位速度场与雷诺应力以及时均涡度场之间的联合概率密度函数，从而研究了在远边缘区域增强等离子体密度的团块的形成、雷诺应力的行为、其交叉相位和交叉相干性、突发径向方位动量输运事件的产生以及大尺度剪切层的形成。乔治泰南UCSD能源研究中心提交日期：2007年7月23日电子表格版本1.4
Submitted for the DPP07 Meeting of The American Physical Society On the Statistical Properties of the Turbulent Reynolds Stress ZHENG YAN, GEORGE TYNAN, JONATHAN YU, CHRIS HOLLAND, STEFAN MULLER, MIN XU, Center For Energy Research — Statistical properties of the turbulent Reynolds stress has been studied on the CSDX linear device. The strongest power of the turbulent Reynolds stress is located near the maximal density gradient region, and the cross-phase between the turbulent radial and azimuthal velocity fields determines the shape and the amplitude of the Reynolds stress, and hence the shear flow generation. The PDF of the turbulent ion-saturation current shows that density bursts are born in the vicinity of the shear layer. Joint PDF between the turbulent ion-saturation current, turbulent radial and azimuthal velocity fields and Reynolds stress are computed, as well as the time-averaged vorticity fields, which allows the study of the relation between the formation of blobs of enhanced plasma density in the far edge region, the behavior of the Reynolds stress, its cross-phase and cross-coherence, generation of bursty radially going azimuthal momentum transport events, and the formation of the large-scale shear layer. George Tynan UCSD Center For Energy Research Date submitted: 23 Jul 2007 Electronic form version 1.4