The effect of a dominant initial single mode on the Kelvin–Helmholtz instability evolution: New insights on previous experimental results
Abstract
This paper brings new insights on an experiment, measuring the Kelvin–Helmholtz (KH) instability evolution, performed on the OMEGA-60 laser facility. Experimental radiographs show that the initial seed perturbations in the experiment are of multimode spectrum with a dominant single-mode of 16 μm wavelength. In single-mode-dominated KH instability flows, the mixing zone (MZ) width saturates to a constant value comparable to the wavelength. However, the experimental MZ width at late times has exceeded 100 μm, an order of magnitude larger. In this work, we use numerical simulations and a statistical model in order to investigate the vortex dynamics of the KH instability for the experimental initial spectrum. Here, we conclude that the KH instability evolution in the experiment is dominated by multimode, vortex-merger dynamics, overcoming the dominant initial mode.
- Authors:
-
- NRCN (Israel); BGU (Israel)
- NRCN, (Israel); Univ. of Michigan, Ann Arbor, MI (United States)
- Univ. of Michigan, Ann Arbor, MI (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Univ. of Michigan, Ann Arbor, MI (United States)
- Publication Date:
- Research Org.:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1329897
- Report Number(s):
- LA-UR-15-26260
Journal ID: ISSN 0098-2202
- Grant/Contract Number:
- AC52-06NA25396
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Fluids Engineering
- Additional Journal Information:
- Journal Volume: 138; Journal Issue: 7; Journal ID: ISSN 0098-2202
- Publisher:
- American Association of Mechanical Engineers (ASME)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; wavelength; computer simulation; simulation; waves; shear (mechanics); vortices; dynamics (mechanics); flow (dynamics)
Citation Formats
Shimony, Assaf, Shvarts, Dov, Malamud, Guy, Di Stefano, Carlos A., Kuranz, Carolyn C., and Drake, R. P. The effect of a dominant initial single mode on the Kelvin–Helmholtz instability evolution: New insights on previous experimental results. United States: N. p., 2016.
Web. doi:10.1115/1.4032530.
Shimony, Assaf, Shvarts, Dov, Malamud, Guy, Di Stefano, Carlos A., Kuranz, Carolyn C., & Drake, R. P. The effect of a dominant initial single mode on the Kelvin–Helmholtz instability evolution: New insights on previous experimental results. United States. https://doi.org/10.1115/1.4032530
Shimony, Assaf, Shvarts, Dov, Malamud, Guy, Di Stefano, Carlos A., Kuranz, Carolyn C., and Drake, R. P. Tue .
"The effect of a dominant initial single mode on the Kelvin–Helmholtz instability evolution: New insights on previous experimental results". United States. https://doi.org/10.1115/1.4032530. https://www.osti.gov/servlets/purl/1329897.
@article{osti_1329897,
title = {The effect of a dominant initial single mode on the Kelvin–Helmholtz instability evolution: New insights on previous experimental results},
author = {Shimony, Assaf and Shvarts, Dov and Malamud, Guy and Di Stefano, Carlos A. and Kuranz, Carolyn C. and Drake, R. P.},
abstractNote = {This paper brings new insights on an experiment, measuring the Kelvin–Helmholtz (KH) instability evolution, performed on the OMEGA-60 laser facility. Experimental radiographs show that the initial seed perturbations in the experiment are of multimode spectrum with a dominant single-mode of 16 μm wavelength. In single-mode-dominated KH instability flows, the mixing zone (MZ) width saturates to a constant value comparable to the wavelength. However, the experimental MZ width at late times has exceeded 100 μm, an order of magnitude larger. In this work, we use numerical simulations and a statistical model in order to investigate the vortex dynamics of the KH instability for the experimental initial spectrum. Here, we conclude that the KH instability evolution in the experiment is dominated by multimode, vortex-merger dynamics, overcoming the dominant initial mode.},
doi = {10.1115/1.4032530},
journal = {Journal of Fluids Engineering},
number = 7,
volume = 138,
place = {United States},
year = {Tue Apr 12 00:00:00 EDT 2016},
month = {Tue Apr 12 00:00:00 EDT 2016}
}
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Works referencing / citing this record:
Observation of dual-mode, Kelvin-Helmholtz instability vortex merger in a compressible flow
journal, May 2017
- Wan, W. C.; Malamud, G.; Shimony, A.
- Physics of Plasmas, Vol. 24, Issue 5
Construction and validation of a statistical model for the nonlinear Kelvin-Helmholtz instability under compressible, multimode conditions
journal, December 2018
- Shimony, A.; Wan, W. C.; Klein, S. R.
- Physics of Plasmas, Vol. 25, Issue 12