イベント情報
【GIR公開セミナー】 Dr. Christophe Almarcha
| 日時 | 2019.8.13（13：30～14：30） |
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| 会場 | |
| 講演タイトル | Dr. Christophe Almarcha (Aix Marseille University, France) "Dynamics of a reactive gaseous interface: Use of complex poles to describe the nonlinear evolution" 〈講演要旨〉 A premixed flame is a sub-millimeter interface through which a mixture of reacting gas is transforming into burned gas with an increase in temperature and molar volume by a factor 8. This is due to the global exothermicity of hundreds of chemical reactions at play. The gas expansion at the reactive interface induces hydrodynamical instabilities that are wrinkling the interface in a complex dynamics. Some cells are forming and merging in a fashion similar to bubbles in Rayleigh-Taylor instability. However, contrary to that instability, the propagation of the flame induces a limitation of the wrinkling amplitude and it is then possible to describe the evolution of the interface with a PDE equation: the Michelson-Sivashinsky equation. Moreover some analytical solutions consisting of pole trajectories in the complex plane are capable of describing all the dynamics, even in the fully nonlinear regime. This is what we demonstrate experimentally in a quasi-2D burner. |
| 言語 | 英語 |
| 対象 | どなたでも、ご聴講いただけます。 |
| 共催 | グローバルイノベーション研究院 ライフサイエンス分野 田川研究チーム 卓越大学院プログラム 学長裁量経費による海外研究者招聘助成プログラム |
| 開催概要 | |
| お問い合わせ窓口 | グローバルイノベーション研究院 工学研究院 長津 雄一郎 Email: nagatsu (ここに@を入れてください) cc.tuat.ac.jp |
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