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The Rayleigh–Taylor instability in inertial fusion, astrophysical plasma and flames

V Bychkov, M Modestov, V Akkerman, L-E Eriksson2007年Plasma Physics and Controlled FusionIF 2.2出版社

Previous results are reviewed and new results are presented on the Rayleigh–Taylor instability in inertial confined fusion, flames and supernovae including gravitational and thermonuclear explosion mechanisms. The instability couples micro-scale plasma effects to large-scale hydrodynamic phenomena. In inertial fusion the instability reduces target compression. In supernovae the instability produces large-scale convection, which determines the fate of the star. The instability is often accompanied by mass flux through the unstable interface, which may have either a stabilizing or a destabilizing influence. Destabilization happens due to the Darrieus–Landau instability of a deflagration front. Still, it is unclear whether the instabilities lead to well-organized large-scale structures (bubbles) or to relatively isotropic turbulence (mixing layer).

日本語訳

これまでの研究成果を概観し、慣性核融合、火炎、および超新星(重力および熱核爆発機構を含む)におけるレイリー・テイラー不安定性に関する新たな結果を提示する。この不安定性は、微視的スケールのプラズマ効果を巨視的スケールの流体力学的現象と結びつける。慣性核融合において、この不安定性はターゲットの圧縮を低下させる。超新星において、この不安定性は大規模な対流を生じさせ、それが恒星の運命を決定づける。この不安定性はしばしば、不安定界面を通じた質量流束を伴い、その流束は安定化効果または不安定化効果のいずれかを有し得る。不安定化は、デフラグレーション(緩燃焼) front のダリウス・ランダウ不安定性によって生じる。それでもなお、これらの不安定性が、秩序だった大規模構造(バブル)を生じるのか、それとも比較的等方的な乱流(混合層)を生じるのかは、依然として明らかではない。

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Inertial confinement fusionRayleigh-Taylor instability
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