Experimental observations of the mixing transition in a shock-accelerated gas curtain
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
Richtmyer{endash}Meshkov instability of a thin curtain of heavy gas (SF{sub 6}) embedded in air and accelerated by a planar shock wave (Mach 1.2) leads to the growth of interfacial perturbations in the curtain and to mixing. Our experiments produce a phenomenological description of the mixing transition and incipient turbulence during the first millisecond after the shock interaction. Growth of scales both larger and smaller than that of initial perturbations is visually observed and quantified by applying a wavelet transform to laser-sheet images of the evolving gas curtain. Histogram and wavelet analyses show an abrupt mixing transition for a multimode initial perturbation that is not apparent for single-mode perturbations. {copyright} {ital 1999 American Institute of Physics.}
- OSTI ID:
- 289207
- Journal Information:
- Physics of Fluids (1994), Journal Name: Physics of Fluids (1994) Journal Issue: 1 Vol. 11; ISSN PHFLE6; ISSN 1070-6631
- Country of Publication:
- United States
- Language:
- English
Similar Records
Growth rate and transition to turbulence of a gas curtain
Power-Law Spectra of Incipient Gas-Curtain Turbulence
Flow Visualization and Measurements of the Mixing Evolution of a Shock-Accelerated Gas Curtain
Conference
·
Mon Sep 01 00:00:00 EDT 1997
·
OSTI ID:525023
Power-Law Spectra of Incipient Gas-Curtain Turbulence
Journal Article
·
Tue Sep 01 00:00:00 EDT 1998
· Physical Review Letters
·
OSTI ID:657810
Flow Visualization and Measurements of the Mixing Evolution of a Shock-Accelerated Gas Curtain
Conference
·
Mon Jul 19 00:00:00 EDT 1999
·
OSTI ID:760445