Compressible, Convergent Richtmyer-Meshkov Experiment
Abstract
Foam-filled cylinders have been imploded by the OMEGA laser at the University of Rochester. A marker layer of heavier material with a controlled surface roughness spectrum is placed between the foam and the outside ablator. The marker layer is hydrodynamically unstable when a strong shock (Mach number 5-20) passes through both these interfaces and the marker layer material mixes into the foam and the ablator. These experiments thus measure mix in the compressible, convergent, miscible, strong-shock regime. Experimental measurements are of the temporal evolution of the radial location and width of the marker layer. These measurements are made well past the time of minimum radius and show the "bounce" of the system as it re-expands. Detailed modeling of this experiment reproduces the trajectory of the marker layer, the growth of the mixing zone, and the profile of the mixing layer. This research was performed by the Los Alamos National Laboratory under the auspices of the United States Department of Energy under contract No. W-7405-ENG-36.
- Publication:
-
APS Division of Fluid Dynamics Meeting Abstracts
- Pub Date:
- November 2002
- Bibcode:
- 2002APS..DFD.KP005B