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Published in:
2019 | OriginalPaper | Chapter
The Evolution of Concentration and Velocity Fluctuations in the Richtmyer-Meshkov Instability
Authors : D. Reese, C. Noble, A. Ames, J. Oakley, D. Rothamer, R. Bonazza
Published in: 31st International Symposium on Shock Waves 1
Publisher: Springer International Publishing
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Abstract
The Richtmyer-Meshkov instability (RMI) is studied experimentally in the Wisconsin Shock Tube Laboratory (WiSTL) using a broadband, shear layer initial condition at the interface between a helium-acetone mixture and argon. This interface (Atwood number A = 0.7) is accelerated by either a M = 1.6 or M = 2.2 planar shock wave, and the development of the RMI is investigated through simultaneous planar laser-induced fluorescence (PLIF) and particle image velocimetry (PIV) measurements at the initial condition and four post-shock times. Simultaneously measuring concentration and velocity allows us, for the first time, to experimentally determine turbulence quantities in this regime, such as the Reynolds stresses, as well as study the effect of incident shock strength on turbulent mass-flux velocities, and the evolution of the planar turbulent kinetic energy (TKE) spectrum.