2025 Workshop on Flow Measurement Techniques in Extreme Environments
This two-day workshop united leaders in fluid, thermal, and solid mechanics to tackle the challenges of measuring and modeling complex phenomena under extreme conditions. Extreme conditions refer to fast transients happening at microscopic spatio-temporal scales, which lead to compressibility effects coupled with extreme pressure and temperature. Such environments are encountered in a variety of regimes. These include cavitation erosion, boiling, hypersonic boundary layers (with ablation and erosion effects), additive manufacturing processes, ice accretion, or high-energy-density physics. These communities have leveraged progress in hardware and software to advance their diagnostics. However, they typically operate in siloed environments, and it would be opportune to bring them together to discuss recent developments and identify synergy and collaboration opportunities.
To guide the development of next-generation instrumentation, select experimental, computational, and theoretical experts presented critical modeling gaps, highlighting where experimental data is most needed. The program featured cutting-edge techniques, identified future trends, and fostered collaboration across hydrodynamics, aerodynamics, multiphase flows, acoustics, thermal science, surface chemistry, advanced materials, and solid mechanics. Participants spanning academia, government labs, industry, and key funding agencies, shaped a path toward a data-rich, integrated future in extreme fluid dynamics.
Agenda
- Thursday August 21st
Day 1 Time Topic Speaker 8:00-8:30 Welcoming remarks, Structure, and Goals 8:30-9:15 Plenary: Cavitation Erosion - knowledge gaps and instrumentation needs Thad Michaels 9:15-10:00 Plenary: Diagnostics for fast transients Paul Danehy 10:00-10:30 Break
10:30-12:00 Round Robin Presentations - 1 10:30-10:45 Cavitation Erosion: Experiments in the Navy’s William B. Morgan Large Cavitation Channel Joel Hartenberger 10:45-11:00 Soft interferometry sensor for wall stress measurements in high Re turbulent flows. Jian Sheng 11:00-11:15 3D Flow Measurements Within Turbomachines and Rough Wall Boundary Layers Joseph Katz 11:15-11:30 Beyond velocity: Near-wall flow and scalar field diagnostics with advanced molecular tagging velocimetry Charles Fort 11:30-11:45 Local Rheological Probes of Stress Heterogeneities in Flowing Complex Fluids Daniel Blair 11:45-12:00 Advancing direct van der Waals simulation to FlowX conditions Hector Gomez 12:00-13:00 Lunch & Lab Tours
13:00-15:00 Round Robin Presentations - 2 13:00-13:15 Neural Data Assimilation from Particle Tracks for Turbulence, Buoyancy, and FSI Flow Reconstruction Sam Grauer 13:15-13:30 Embedded Imaging in Harsh Environments Brian Thurow 13:30-13:45 Visual microphone Robert Pless 13:45-14:00 Photon Doppler Velocimetry Measurements of Shock Wave - Particle Curtain Experiments in the LANL Horizontal Shock Tube Chris Noble 14:00-14:15 Direct simulations of Boiling Elias Balaras 14:15-14:30 “Off the grid” modeling and simulation Steven Rodriguez 14:30-14:45 Hypersonic Turbulent Quantities and Drop Aerobreakup/Impact Nick Parziale 14:45-15:00 An Overview of Recent High-Speed Droplet Aerobreakup and Impingement Simulations and Modeling Challenges Chris Brehm 15:00-15:30 Break
15:30-17:30 Breakout sessions - 1 17:30-18:00 Breakout summaries 18:30 social - Friday August 22nd
Day 2 8:00-8:45 Day 1 summary and Goals 8:45-9:30 Plenary: Diagnostics Capability Overview for dynamic measurements Minta Akin 9:30-10:15 Plenary: Analysis of Erosion in Aerospace Structures Using Peridynamics Ibrahim Guven 10:15-10:30 break
10:30-12:00 Round Robin Presentations - 3 10:30-10:45 Non-equilibrium measurements Arthur Dogariu 10:45-11:00 Laser Diagnostics in High-Enthalpy Ground-Test Facilities Sean Kerney 11:00-11:15 High Velocity High Temperature Impact Experiments: Investigating Material Response Under Extreme Conditions Suraj Ravindran 11:15-11:30 Temperature and Pressure Sensitive Paints for high-speed flows Daniel Reese 11:30-11:45 Ballistic Imaging for Optically Thick Bubbly Flows Daniel Hunter 11:45-12:00 In-Lab X-ray Techniques for Multiphase Flows Simo Makiharju 12:00-13:00 Working lunch - Panel Discussion: Funding Agencies Needs
ONR (Yin-Lu Young, Eric Marineau), NNSA (James Peltz)
13:00-15:00 Breakout sessions 15:00-15:30 Break
15:30-16:00 Breakout summaries 16:00-17:30 Workshop summary and action items 18:00 social