Understanding the implications of the data from recent high-energy-density Kelvin-Helmholtz shear layer experiments

Conference · Mon Oct 26 04:00:00 EDT 2009

DOI:https://doi.org/10.1088/1742-6596/244/4/042007· OSTI ID:967762

Hurricane, O A; Hansen, J F; Harding, E C; Drake, R P; Robey, H F; Remington, B A; Kuranz, C C; Grosskopf, M J; Gillespie, R S; Park, H

The first successful high energy density Kelvin-Helmholtz (KH) shear layer experiments (O.A. Hurricane, et al., Phys. Plasmas, 16, 056305, 2009; E.C. Harding, et al., Phys. Rev. Lett., 103, 045005, 2009) demonstrated the ability to design and field a target that produces an array of large diagnosable KH vortices in a controlled fashion. Data from these experiments vividly showed the complete evolution of large distinct eddies, from formation to apparent turbulent break-up. Unexpectedly, low-density bubbles/cavities comparable to the vortex size ({approx} 300 - 400 {micro}m) appeared to grow up in the free-stream flow above the unstable material interface. In this paper, the basic principles of the experiment will be discussed, the data reviewed, and the progress on understanding the origin of the above bubble structures through theory and simulation will be reported on.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 967762
• Report Number(s): LLNL-PROC-418723
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BUBBLES
DESIGN
ENERGY DENSITY
ORIGIN
SHEAR
SIMULATION
TARGETS
VORTICES