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However, it is shown from the transport simulation using our model that, in the region where the turbulence inhomogeneity is significant, the anomalous diffusivity deviates from the local parameter expression due to the transport terms in the K-epsilon equations. Our model explains the experimental results consistently in that it gives the GRB or LHD scaling for the energy confinement time and reproduces the experimentally obtained profile of the anomalous diffusivity which has large values in the peripheral region in contrast with the GRB model.\"", "subitem_description_type": "Abstract"}]}, "item_5_source_id_10": {"attribute_name": "ISSN", "attribute_value_mlt": [{"subitem_source_identifier": "0915-633X", "subitem_source_identifier_type": "ISSN"}]}, "item_5_text_25": {"attribute_name": "登録情報", "attribute_value_mlt": [{"subitem_text_value": "Made available in DSpace on 2010-02-05T10:19:41Z (GMT). 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K-(epsilon) Model of Anomalous Transport in Resistive Interchange Turbulence
http://hdl.handle.net/10655/3077
http://hdl.handle.net/10655/307701802af1-f278-4f81-af20-8b5649af7842
Item type | 研究報告書 / Research Paper(1) | |||||
---|---|---|---|---|---|---|
公開日 | 2010-02-05 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | K-(epsilon) Model of Anomalous Transport in Resistive Interchange Turbulence | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | resistive interchange turbulence | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | anomalous transport | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | K-epsilon model | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_18ws | |||||
資源タイプ | research report | |||||
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 |
"Sugama, H.
× "Sugama, H.× Okamoto, M.× Wakatani, M." |
|||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | "A K- epsilon anomalous transport model for resistive interchange turbulence is presented and applied to the transport analysis of ECH plasmas in Heliotron E. In this model, the turbulent kinetic energy K equiv1/2 < ilda{upsilon}^2 > and its viscous dissipation rate epsilon characterize the local turbulence and the anomalous transport coefficient is given by D ~ K^2/epsilon, which has some nonlocal properties not included in the conventional expressions since their temporal and spatial variations are determined by taking into account the transport of the turbulent energy itself. In the case of the homogeneous turbulence where the anomalous transport may be described in terms of the local plasma parameters, the dimensional analysis applied to our model yields the two types of local parameter expressions of the anomalous diffusivity in the high and low collisional cases. We find a familiar diffusivity for the resistive interchange turbulence derived in the high collisional case and we have another one similar to the gyro-reduced Bohm (GRB) diffusivity in the low collisional case. However, it is shown from the transport simulation using our model that, in the region where the turbulence inhomogeneity is significant, the anomalous diffusivity deviates from the local parameter expression due to the transport terms in the K-epsilon equations. Our model explains the experimental results consistently in that it gives the GRB or LHD scaling for the energy confinement time and reproduces the experimentally obtained profile of the anomalous diffusivity which has large values in the peripheral region in contrast with the GRB model." | |||||
書誌情報 |
en : Research Report NIFS-Series 発行日 1992-09-01 |
|||||
報告書番号 | ||||||
NIFS-170 | ||||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0915-633X |