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Spatio-temporal dynamics of turbulence trapped in geodesic acoustic modes
http://hdl.handle.net/10655/00012784
http://hdl.handle.net/10655/0001278425f5af9c-9571-4312-9f2e-ec685d26f8b3
名前 / ファイル | ライセンス | アクション |
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Phys.Plasmas25_pp012316 (2.1 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2021-12-20 | |||||
タイトル | ||||||
タイトル | Spatio-temporal dynamics of turbulence trapped in geodesic acoustic modes | |||||
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 | |||||
著者 |
Sasaki, Makoto
× Sasaki, Makoto× Kobayashi, Tatsuya× ITOH, Kimitaka× KASUYA, Naohiro× Kosuga, Yusuke× Fujisawa, A.× ITOH, Sanae -I. |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | The spatio-temporal dynamics of turbulence with the interaction of geodesic acoustic modes (GAMs) are investigated, focusing on the phase-space structure of turbulence, where the phase-space consists of real-space and wavenumber-space. Based on the wave-kinetic framework, the coupling equation between the GAM and the turbulence is numerically solved. The turbulence trapped by the GAM velocity field is obtained. Due to the trapping effect, the turbulence intensity increases where the second derivative of the GAM velocity (curvature of the GAM) is negative. While, in the positive-curvature region, the turbulence is suppressed. Since the trapped turbulence propagates with the GAMs, this relationship is sustained spatially and temporally. The dynamics of the turbulence in the wavenumber spectrum are converted in the evolution of the frequency spectrum, and the simulation result is compared with the experimental observation in JFT-2M tokamak, where the similar patterns are obtained. The turbulence trapping effect is a key to understand the spatial structure of the turbulence in the presence of sheared flows. | |||||
書誌情報 |
Physics of Plasmas 巻 25, 号 1, p. 012316, 発行日 2017-01-25 |
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出版者 | ||||||
出版者 | AIP Publication | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1070664X | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA10987555 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1063/1.5008541 | |||||
権利 | ||||||
権利情報 | This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Physics of Plasmas 25, 012316 (2018); and may be found at https://aip.scitation.org/doi/abs/10.1063/1.5008541. | |||||
権利 | ||||||
権利情報 | Copyright 2017 Author(s). This article is distributed under a Creative Commons Attribution (CC BY) License. | |||||
情報源 | ||||||
関連名称 | Physics of Plasmas 25, 012316 (2018); https://doi.org/10.1063/1.5008541 | |||||
関連サイト | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1063/1.5008541 | |||||
関連名称 | Publisher version | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
NAIS | ||||||
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