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Derivation of Ion Transport Coefficients Driven by Ion–Atom Collisions Using the Chapman–Enskog Expansion and the Boltzmann Collision Integral
https://repo.qst.go.jp/records/2001811
https://repo.qst.go.jp/records/2001811303577ad-6fb1-4e22-9950-05f8ed432d90
| アイテムタイプ | 学術雑誌論文 / Journal Article(1) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 公開日 | 2025-08-28 | |||||||||
| タイトル | ||||||||||
| タイトル | Derivation of Ion Transport Coefficients Driven by Ion–Atom Collisions Using the Chapman–Enskog Expansion and the Boltzmann Collision Integral | |||||||||
| 言語 | en | |||||||||
| 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 |
Umezaki Daisuke
× Umezaki Daisuke
× Yanagihara Kota
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| 抄録 | ||||||||||
| 内容記述タイプ | Abstract | |||||||||
| 内容記述 | To realize a fusion reactor, reducing the divertor heat load is essential, necessitating the development of accurate physical models. In divertor plasmas, large-angle scattering between ions and atoms drives ion transport perpendicular to magnetic field lines. This study derives transport coefficients for hydrogen isotope ions due to ion–atom collisions using the Chapman–Enskog expansion method.Afast computational method for the Boltzmann collision integral is presented, incorporating the differential cross section. The proposed transport coefficients are provided as user-friendly data for application to fluid simulation codes. The diffusion coefficient for protons can exceed the Bohm diffusion coefficient under conditions of low magnetic field and high hydrogen atom density. The derived diffusion coefficient yields density profiles that show improved agreement with kinetic calculations compared to those obtained using our previous diffusion coefficient model. | |||||||||
| 書誌情報 |
Contributions to Plasma Physics 巻 65, 号 7, 発行日 2025-05 |
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| DOI | ||||||||||
| 識別子タイプ | DOI | |||||||||
| 関連識別子 | 10.1002/ctpp.70025 | |||||||||
