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DTSTART;TZID=America/New_York:20251202T101500
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DTSTAMP:20260601T175053
CREATED:20251114T172114Z
LAST-MODIFIED:20251114T172114Z
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SUMMARY:MEAM Seminar: "Modeling and Analysis of Wall-bounded Turbulent Flows"
DESCRIPTION:Most fluid flows at human scales and at moderate speeds (> 1 m/s) reach Reynolds numbers of at least 10⁴ or higher\, causing even tiny disturbances to amplify and drive the flow toward turbulence. Turbulence is a broadband\, continuum phenomenon: turbulent eddies of vastly different time and length scales enhance the mixing and transport of momentum\, heat\, and scalars through chaotic fluctuations. These processes critically affect system performance\, influencing drag/lift/noise/vibration on lifting surfaces\, energy-conversion efficiency (e.g.\, wind turbines and combustion engines)\, and the spread of pollutants or airborne diseases. \nIn this talk\, I will highlight computational research from my group on modeling wall-bounded turbulent flows\, analyzing laminar–turbulent transition through stability theory\, and developing Lagrangian approaches for turbulent momentum transport. I will first summarize my work on wall-modeled large-eddy simulation (WMLES)\, a leading technique for affordable\, scale-resolving simulations of wall turbulence\, applied to both canonical configurations (flat plates\, channels) and complex geometries (aircraft and atmospheric flows over sand dunes). I will then discuss the relevance of boundary layers with intrinsic three-dimensionality in these complex flows and present our recent efforts to understand turbulence transition originating from a three-dimensional base flow. Lastly\, I will showcase our ongoing research on extracting Lagrangian information in a fully Eulerian manner—without particle tracking—which has revealed previously unseen flow phenomena that warrant further investigation.
URL:https://seasevents.nmsdev7.com/event/meam-seminar-modeling-and-analysis-of-wall-bounded-turbulent-flows/
LOCATION:Wu and Chen Auditorium (Room 101)\, Levine Hall\, 3330 Walnut Street\, Philadelphia\, PA\, 19104\, United States
ORGANIZER;CN="Mechanical Engineering and Applied Mechanics":MAILTO:meam@seas.upenn.edu
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