<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 14pt; color: rgb(0, 0, 0);">
<b><i>"Stellar Turbulence Modeling with Adaptive Mesh Refinement: Assessment of Performance of Select Refinement Strategies"</i></b></div>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 14pt; color: rgb(0, 0, 0);">
<b>Ryan Learn</b></div>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 10pt; color: rgb(0, 0, 0);">
Department of Mathematics and Statistics</div>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 10pt; color: rgb(0, 0, 0);">
Washington State University Tri-Cities</div>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
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>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<b>NOTE: In-person attendance is requested in our 499 Dirac Science Library (DSL) Seminar Room.</b> Zoom access is intended for external (non-departmental) participants only. </div>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<b>https://fsu.zoom.us/j/94273595552 </b></div>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Meeting # <b>942 7359 5552 </b></div>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
🎦 Colloquium recordings will be made available here, <a href="https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.sc.fsu.edu%2Fcolloquium&data=05%7C02%7Csc-seminar-announce%40lists.fsu.edu%7C49b11127a66a4733354408dd64c5aa27%7Ca36450ebdb0642a78d1b026719f701e3%7C0%7C0%7C638777522293835086%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=yf0eq40qGg6Wzxmr7lSeAN%2FnPNQ6ODhWap20EYWxbNI%3D&reserved=0" originalsrc="https://www.sc.fsu.edu/colloquium">
https://www.sc.fsu.edu/colloquium</a> </div>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<b>Wednesday, Mar 19, 2025, Schedule: </b></div>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
* 3:00 to 3:30 PM Eastern Time (US and Canada) </div>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
☕ Nespresso & Teatime - 417 DSL Commons </div>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<b>* 3:30 to 4:30 PM Eastern Time (US and Canada) </b></div>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<b>🕟 Colloquium - 499 DSL Seminar Room </b></div>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<b>Abstract: </b></div>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Turbulent flows are ubiquitous in Earth-bound and astrophysical physical systems, and numerical simulations of such flows features prominently in such varied applications as weather forecasting, studies of convective plumes within the Earth's mantle, and modeling
of supernova progenitors. Such studies require significant amounts of computational resources and benefit greatly from advances in computational methods, specifically in the case of terrestrial combustion studies, defense applications, problems in planetary
sciences and astrophysics, the use of Adaptive Mesh Refinement (AMR), has achieved particular success.</div>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
AMR leverages the fact that computational effort to obtain certain solution accuracy may not be uniform throughout the computational domain. Thus, AMR schemes selectively place finer-resolution grids in regions corresponding to high solution error, and coarser
grids in regions corresponding to lower solution error. Such discontinuous refinement seeks to compute solutions on the same order of accuracy as uniform meshes, but much more efficiently. In the case of realistic fluid flows, computation of exact solution
error is unachievable, and thus various proxies for solution error must be used, resulting in a wide variety of mesh refinement schemes, using solution quality estimators to selectively refine and coarsen the grid.</div>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Despite the widespread implementation of AMR methods using various refinement schemes in computational fluid dynamic codes, the effect of these discontinuous discretizations on the statical properties of turbulent flows has largely been unexamined, potential
having a deleterious effect on the accuracy of numerical solution studied using such codes. In this talk, we present our findings on the effect of various AMR refinement schemes on select key statistical metrics of turbulence in a variety of weakly-to-moderately
compressible flows under conditions typical of select astrophysical systems.</div>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Additional colloquium details can be found here,</div>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<a href="https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.sc.fsu.edu%2Fnews-and-events%2Fcolloquium%2F1864-colloquium-with-ryan-learn-2025-03-19&data=05%7C02%7Csc-seminar-announce%40lists.fsu.edu%7C49b11127a66a4733354408dd64c5aa27%7Ca36450ebdb0642a78d1b026719f701e3%7C0%7C0%7C638777522293853310%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=nRAPX9xM4nxKJS3Ye9IGZBKoCAYqgM%2BykoDE%2FOd21%2Bc%3D&reserved=0" originalsrc="https://www.sc.fsu.edu/news-and-events/colloquium/1864-colloquium-with-ryan-learn-2025-03-19">https://www.sc.fsu.edu/news-and-events/colloquium/1864-colloquium-with-ryan-learn-2025-03-19</a></div>
<div class="elementToProof" style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
</body>
</html>