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<span style="font-size: 14pt;"><b><i>"Supersonic Combustion: From a Detonation Engine to an Exploding Star"
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<div class="ContentPasted0"><span style="font-size: 14pt;"><b>Alexei Poludnenko</b></span></div>
<div class="ContentPasted0"><span style="font-size: 10pt;">School of Mechanical, Aerospace, </span><span style="font-size: 10pt;">and Manufacturing Engineering</span></div>
<div class="ContentPasted0"><span style="font-size: 10pt;">University of Connecticut (UCONN)</span></div>
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<div class="ContentPasted0">Please feel free to forward/share this invitation with other groups/disciplines that might be interested in this talk/topic.
<b>All are welcome to attend.</b></div>
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<div class="ContentPasted0">NOTE: <b>In-person attendance is requested.</b> Zoom access is intended for external (non-departmental) participants only.
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<div class="ContentPasted0"><b>https://fsu.zoom.us/j/94273595552 </b></div>
<div class="ContentPasted0">Meeting # <b>942 7359 5552 </b></div>
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<div class="ContentPasted0">🎦 Colloquium recordings will be made available here,
<a href="https://www.sc.fsu.edu/colloquium">https://www.sc.fsu.edu/colloquium</a> </div>
<div><b style="font-family: inherit; font-size: inherit; font-style: inherit; font-variant-ligatures: inherit; font-variant-caps: inherit;">Wednesday, Nov 15</b>, 2023, Schedule: <br>
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<div class="ContentPasted0">* <b>3:00</b> to 3:30 PM Eastern Time (US and Canada)
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<div class="ContentPasted0">☕ <b>Nespresso & Teatime - 417 DSL Commons </b></div>
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<div class="ContentPasted0">* <b>3:30</b> to 4:30 PM Eastern Time (US and Canada)
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<div class="ContentPasted0">🕟 <b>Colloquium - 499 DSL Seminar Room </b></div>
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<div class="ContentPasted0"><b>Abstract: </b></div>
<div class="ContentPasted0">Reacting flows are pervasive both in our daily lives on Earth and in the Universe. They power modern society being at the heart of many energy generation and propulsion systems, such as gas turbines, internal combustion and jet engines.
At the same time, they also power the Universe through the energy produced in stellar interiors. Despite this ubiquity in Nature, reacting flows still pose a number of fundamental questions concerning their structure and dynamics often exhibiting surprising
and unexpected behavior. In recent years, the advent of large-scale direct numerical simulations (DNS) has enabled detailed exploration of the reacting flow dynamics in extreme, previously inaccessible supersonic regimes characterized by high flow speeds,
significant compressibility effects, and strong coupling between exothermic reactions and the fast turbulent flow. Such combustion regimes are fundamental to the operation of many modern propulsion applications from scramjets to detonation-based engines. This
talk will present an overview of a range of phenomena discovered in recent years in DNS of high-speed reacting flows. These range from intrinsic instabilities of reacting turbulence, which can lead to the onset of catastrophic transitions, e.g., spontaneous
detonation formation, to the qualitative changes in the nature of the turbulent cascade in the presence of exothermic reactions, to the fundamental and still largely enigmatic properties of the dynamics of detonations. Finally, challenges presented by these
findings will be discussed both in the context of our theoretical understanding of reacting flows, and also in the context of modern modeling paradigms, such as Large Eddy Simulations.</div>
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<div class="ContentPasted0">Additional colloquium details can be found here, </div>
<a href="https://www.sc.fsu.edu/news-and-events/colloquium/1763-colloquium-with-alexei-poludnenko-2023-11-15">https://www.sc.fsu.edu/news-and-events/colloquium/1763-colloquium-with-alexei-poludnenko-2023-11-15</a><br>
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