Vortex ring ejection from shocked interfaces in high-energy-density flows
ORAL
Abstract
Vortex rings abound in shocked interfacial flows, and their importance in inertial confinement fusion (ICF), supernovae, and the Richtmyer-Meshkov instability (RMI) is only beginning to be understood. Such a ring forms when a shock passes through an interface with a heavy-material protrusion, the dynamics of which are captured by our theory generalizing classical scaling laws from fluid dynamics. Our computational results indicate that the energy transported by the ring saturates at a critical protrusion aspect ratio, and our ongoing campaign at the Omega-EP laser captures the dynamics of these vortex rings in unprecedented detail. The scaling uncovered by this systematic study of vortex rings in a high-energy-density regime will inform mix mitigation strategies in ICF, especially with respect to the fill tube, surface pits, and voids, and improve our understanding of turbulent transition in the RMI.
*This work is funded by the US DOE NNSA Center of Excellence under cooperative agreement number DE-NA0003869 and the Cecil & Sally Drinkward and Caltech Presidential fellowships. Experiments were conducted at the Omega Laser Facility with the beam time through the National Laser Users' Facility user program. This material is based upon work supported by the DOE NNSA University of Rochester "National Inertial Confinement Fusion Program" under Award Number DE-NA0004144. Targets were provided based on work performed under the auspices of the US DOE by General Atomics under NNSA Contract 89233124CNA000365.
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Presenters
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Michael J Wadas
- California Institute of Technology