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Using dynamical mode decomposition to extract the limit cycle dynamics of modulated turbulence in a plasma simulation
https://repo.qst.go.jp/records/79016
https://repo.qst.go.jp/records/79016563c83d9-12f7-4bd2-b530-46bc56bd1711
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2020-02-20 | |||||
| タイトル | ||||||
| タイトル | Using dynamical mode decomposition to extract the limit cycle dynamics of modulated turbulence in a plasma simulation | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Sasaki, M
× Sasaki, M× Kawachi, Y× Arakawa, H× Kasuya, N× Kin, Fumiyoshi× Yamasaki, K× Inagaki, S× Fumiyoshi, Kin |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The novel technique of dynamical mode decomposition (DMD) is applied to the outputs of a numerical simulation of Kelvin–Helmholtz turbulence in a cylindical plasma, so as to capture and quantify the time evolution of the dominant nonlinear structures. Empirically, these structures comprise rotationally symmetric deformations together with spiral patterns, and they are found to be identified as the main modes of the DMD. A new method to calculate the time evolution of DMD mode amplitudes is proposed, based on convolution-type correlation integrals, and then applied to the simulation outputs in a limit cycle regime. The resulting time traces capture the essential physics far better than Fourier techniques applied to the same data. | |||||
| 書誌情報 |
Plasma Physics and Controlled Fusion 巻 61, 号 11, p. 112001, 発行日 2020-02 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0741-3335 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1088/1361-6587/ab471b | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://iopscience.iop.org/article/10.1088/1361-6587/ab471b | |||||
