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Validation Study On Upwinding Schemes For Core MHD/Turbulent Simulation
https://repo.qst.go.jp/records/54880
https://repo.qst.go.jp/records/548804e429189-5dcc-4b8d-9e07-4b485be2c31b
| Item type | 会議発表論文 / Conference Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2018-04-15 | |||||
| タイトル | ||||||
| タイトル | Validation Study On Upwinding Schemes For Core MHD/Turbulent 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_5794 | |||||
| 資源タイプ | conference paper | |||||
| 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 |
瀬戸, 春樹
× 瀬戸, 春樹× 矢木, 雅敏× 瀬戸 春樹× 矢木 雅敏 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The validity of upwinding schemes for core MHD/turbulent simulation is numerically investigated by the used of a fully linearized 3-field resistive ballooning mode (RBM) model with three different discretiza- tion schemes on a convective derivative, (1) 4th order central differential (C4), (2) 4th order linear upwinding scheme (U4), (3) 3rd order weighted essentially non-oscillatory (WENO) scheme (W3). The simulations reveal that, in the cases with U4 and W3, the temporally varying upwinding direction can be unphysical nonlinear energy channels among toroidal modes and drive unphysical mode transitions even if the equation system is fully linearized theoretically. On the other hand, growth rates and eigen functions of RBM are conserved over the simulation time in the case with C4. These result show that any upwinding scheme should not be employed in the core region where nonlinear wave couplings described by convective derivatives such as the ExB flow term and the magnetic fluttering term are the fundamental nature of plasma instability and turbulence. | |||||
| 書誌情報 |
International Conference Proceedings of MC2017 発行日 2017-04 |
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| 出版者 | ||||||
| 出版者 | Korean Nuclear Society | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://www.kns.org/paper_file/paper/MC2017_2017_11/P384S11-01SetoH.pdf | |||||
| 関連名称 | https://www.kns.org/paper_file/paper/MC2017_2017_11/P384S11-01SetoH.pdf | |||||
