Modulation of Richtmyer-Meshkov Instability in Gas Gun Experiments

ORAL

Abstract

We modulate Richtmyer-Meshkov instability in gas gun experiments by modifying the free and impact surfaces of the copper targets. The sample free surface has various shapes including sinusoidal and square waves. The impact side of the targets are modulated by simple and graded density channels. With these variations, we demonstrate a level of control on velocity and formation of jetting from the sample free surface. Results are consistent with simulations. We present velocity and optical data from these experiments and comparison to simulations.

This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. We gratefully acknowledge the LLNL LDRD Program for partial funding support of this research under Project No. 21-SI-006.

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Presenters

  • Jeffrey H Nguyen

    • Lawrence Livermore National Laboratory
    • Lawrence Livermore Natl Lab

Authors

  • Jeffrey H Nguyen

    • Lawrence Livermore National Laboratory
    • Lawrence Livermore Natl Lab

  • Sylvie Aubry

    • Lawrence Livermore National Laboratory

  • Michael R Armstrong

    • Lawrence Livermore Natl Lab

  • Andrew Hoff

    • Lawrence Livermore National Laboratory

  • Jonathan L Belof

    • Lawrence Livermore Natl Lab
    • Lawrence Livermore National Laboratory

  • Hector Lorenzana

    • Lawrence Livermore National Laboratory

  • Matthew Staska

    • Nevada National Security Site
    • MSTS/STL
    • Special Technologies Laboratory
    • MSTS STL

  • Brandon M LaLone

    • Nevada National Security Site
    • Special Technologies Laboratory
    • MSTS/STL
    • MSTS STL