Analysis of Turbulence Driven Particle Transport in PANTA by Using Multi-Field Singular Value Decomposition

被引：1

作者：

Kodahara, Takumi ^{[1
]}

Sasaki, Makoto ^{[1
]}

Kawachi, Yuichi ^{[2
]}

Jajima, Yuki ^{[1
]}

Kobayashi, Tatsuya ^{[2
]}

Yamada, Takuma ^{[3
,4
]}

Arakawa, Hiroyuki ^{[5
]}

Fujisawa, Akihide ^{[3
,6
]}

机构：

[1] Nihon Univ, Coll Ind Technol, Narashino 2740072, Japan

[2] Natl Inst Fus Sci, Toki 5095202, Japan

[3] Kyushu Univ, Res Ctr Plasma Turbulence, Kasuga 8168580, Japan

[4] Kyushu Univ, Fac Arts & Sci, Fukuoka 8190395, Japan

[5] Kyushu Univ, Fac Med Sci, Dept Hlth Sci, Fukuoka 8128582, Japan

[6] Kyushu Univ, Res Inst Appl Mech, Kasuga 8168580, Japan

来源：

PLASMA AND FUSION RESEARCH | 2023年 / 18卷

关键词：

magnetized plasma; data-driven method; singular value decomposition; drift wave; particle transport;

D O I：

10.1585/pfr.18.1202036

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Multi-field singular value decompositions (SVDs) is applied to turbulence obtained in a cylindrical mag-netized plasma, PANTA. This method enables us to obtain the spatial mode structures with common temporal evolution of different physical quantities, such as the fluctuations of density and flows. Turbulence driven particle transport is evaluated by the method. It is shown that only the coupling of the same mode drives the transport, which stems from the orthogonality of the SVD. Thanks to this characteristics, the number of degrees of freedom which plays roles for the transport dynamics could be significantly reduced.

引用

页数：3

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