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Two-dimensional simulation of pellet ablation with atomic processes
http://hdl.handle.net/10655/3888
http://hdl.handle.net/10655/38880da9959b-59ec-48e6-ae98-d30b340ba978
名前 / ファイル | ライセンス | アクション |
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Phys.Plasmas11_4064 (917.7 kB)
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Item type | 学術雑誌論文 / Journal Article_02(1) | |||||
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公開日 | 2010-10-25 | |||||
タイトル | ||||||
タイトル | Two-dimensional simulation of pellet ablation with atomic processes | |||||
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 |
Ishizaki, R.
× Ishizaki, R.× Parks, P.B.× Nakajima, N.× Okamoto, M. |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | A two-dimensional hydrodynamic simulation code CAP has been developed in order to investigate the dynamics of hydrogenic pellet ablation in magnetized plasmas throughout their temporal evolution. One of the properties of the code is that it treats the solid-to-gas phase change at the pellet surface without imposing artificial boundary conditions there, as done in previous ablation models. The simulation includes multispecies atomic processes, mainly molecular dissociation and thermal ionization in the ablation flow beyond the pellet, with a kinetic heat flux model. It was found that ionization causes the formation of a quasistationary shock front in the supersonic region of the ablation flow, followed by a "second" sonic surface farther out. Anisotropic heating, due to the directionality of the magnetic field, contributes to a nonuniform ablation (recoil) pressure distribution over the pellet surface. Since the shear stress can exceed the yield strength of the solid for a sufficiently high heat flux, the solid pellet can be fluidized and flattened into a "pancake" shape while the pellet is ablating and losing mass. The effect of pellet deformation can shorten the pellet lifetime almost 3× from that assuming the pellet remains rigid and stationary during ablation. | |||||
書誌情報 |
en : Physics of Plasmas 巻 Vol.11, 号 Issue 8, p. pp.4064-4080, 発行日 2004-08-01 |
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出版者 | ||||||
出版者 | American Institute of Physics | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1063/1.1769376 | |||||
権利 | ||||||
権利情報 | (c) 2004 American Institute of Physics | |||||
関連サイト | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1063/1.1769376 | |||||
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 |