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Center for Nonlinear Studies |
High-speed dispersed multiphase flows are present in numerous environmental and engineering applications with complex interactions between turbulence, shock waves, and particles. Compared to its incompressible counterpart, compressible two-phase flows introduce new scales of motion that challenge simulations and experiments. This talk will focus on recent advancements in modeling gas-particle flows under such extreme conditions. An overview of existing Mach number-dependent drag laws will be presented, with origins from 18th-century cannon fire, and new insights from particle-resolved numerical simulations. A new drag law will be presented that spans well subsonic to supersonic flows made up of dilute to dense concentrations of particles. In addition, highly-resolved simulations of shock-particle interactions will be presented that reveal unique turbulence transport mechanisms. A multiphase turbulence model is developed that shows promise for a wide class of high-speed two-phase flows. The talk concludes with limitations of existing models and future directions.
Bio:
Dr. Jesse Capecelatro is an Associate Professor in the Departments of Mechanical Engineering and Aerospace Engineering at the University of Michigan. He received a Ph.D. from Cornell in 2014 followed by a postdoc at the University of Illinois Urbana-Champaign. He is a recipient of the NASA Early-Stage Innovations Award, NSF CAREER Award, ONR Young Investigator Award, and the ASME Pi Tau Sigma Gold Medal Award. His research is broadly under the realm of fluid mechanics, with an emphasis on multiphase flow, turbulence, and scientific computing.
Host: Duan Zhang and Min Wang (T-3)