Image credits:
Dilute suspension of flexiblefibers in turbulent channel flow
(D. Di Giusto, C. Marchioli)
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Click here to download.Confirmed Keynote Speakers
Professor Kun Xue
Beijing Institute of Technology (CHN)
Engineering method for cross-scale evolution of supersonic droplet cloud
Abstract:
Supersonic droplet clouds are ubiquitous in natural and industrial processes, from volcanic eruptions to fire-extinguishing sprays. Their macroscale dispersion emerges from collective microscale dynamics-atomization and transport of massive droplets-modulated by mesoscale inter-droplet wakes. Predicting this cross-scale evolution requires integrated multi-scale investigation. Current "point-particle" Eulerian-Lagrangian methods fail to resolve mesoscale wake structures governing microscale behavior, leading to inaccurate prediction. This work develops a novel engineering method bridging micro-meso-macro scales. A grid-free wake superposition approach reconstructs the mesoscale flow field by superimposing wake contributions from upstream droplets. This reconstructed field drives a high-Weber-number atomization model calibrated via shock tube experiments and droplet transport via a drag surrogate model. These components integrate into an enhanced Lagrangian Particle Tracking framework, enabling physically consistent coupling between atomization and wake modulation. The method is validated against laboratory experiments on supersonic cloud evolution driven by central explosion.
Brief Bio:
Dr. Kun Xue is a Professor at the State Key Laboratory of Explosion Science and Safety Protection, Beijing Institute of Technology. Her research focuses on compressible multiphase flows and deflagration phenomena in complex engineering systems, bridging fundamental fluid mechanics with practical applications in explosion dynamics and safety technologies. Dr. Xue has published over 30 papers in leading journals including Journal of Fluid Mechanics, Physics of Fluids, and International Journal of Multiphase Flow, and authored several books. She actively serves the academic community as a member of several committees under the Chinese Society of Theoretical and Applied Mechanics, including the Multiphase Flow, Shock Wave, and Explosion Mechanics Committees.
Beijing Institute of Technology (CHN)
Engineering method for cross-scale evolution of supersonic droplet cloud
Abstract:
Supersonic droplet clouds are ubiquitous in natural and industrial processes, from volcanic eruptions to fire-extinguishing sprays. Their macroscale dispersion emerges from collective microscale dynamics-atomization and transport of massive droplets-modulated by mesoscale inter-droplet wakes. Predicting this cross-scale evolution requires integrated multi-scale investigation. Current "point-particle" Eulerian-Lagrangian methods fail to resolve mesoscale wake structures governing microscale behavior, leading to inaccurate prediction. This work develops a novel engineering method bridging micro-meso-macro scales. A grid-free wake superposition approach reconstructs the mesoscale flow field by superimposing wake contributions from upstream droplets. This reconstructed field drives a high-Weber-number atomization model calibrated via shock tube experiments and droplet transport via a drag surrogate model. These components integrate into an enhanced Lagrangian Particle Tracking framework, enabling physically consistent coupling between atomization and wake modulation. The method is validated against laboratory experiments on supersonic cloud evolution driven by central explosion.
Brief Bio:
Dr. Kun Xue is a Professor at the State Key Laboratory of Explosion Science and Safety Protection, Beijing Institute of Technology. Her research focuses on compressible multiphase flows and deflagration phenomena in complex engineering systems, bridging fundamental fluid mechanics with practical applications in explosion dynamics and safety technologies. Dr. Xue has published over 30 papers in leading journals including Journal of Fluid Mechanics, Physics of Fluids, and International Journal of Multiphase Flow, and authored several books. She actively serves the academic community as a member of several committees under the Chinese Society of Theoretical and Applied Mechanics, including the Multiphase Flow, Shock Wave, and Explosion Mechanics Committees.
