Three-dimensional signatures of self-similarity in a high-energy-density plasma shear-driven mixing layer
Abstract
A hydrodynamic shear mixing layer experiment at the National Ignition Facility had previously demonstrated Eulerian scaling of integrated, late-time quantities, including turbulent kinetic energy. In this manuscript, the experiment is repeated with new materials. In this work, using the new dataset, we demonstrate that Euler-number scalings hold not just for late time, but dynamically throughout the experiment, for measurements in all three spatial dimensions. Incorporating the dynamic scaling leads to an enhanced calculation that the heavier of the two scaled experiments has approached three generations of mergers of its primary instability's structures and a consistent observation of such a merger in action in the lighter of the two scaled experiments. Furthermore, the improved scrutiny of the time evolution of instability structures leads to sharper estimates of turbulent kinetic energy, including a demonstration of different behaviors correlating with surface roughness (quantitatively consistent with transitions between laminar and turbulent initial states), as predicted by a Reynolds-averaged turbulent model, which evidently correctly handles the differing shock-roughness interactions to drive its internal state of the model into different regimes. Altogether, a picture arises of the analytical improvements in treating these variations (of times, densities, and roughnesses) as a unified whole and of multiple waysmore »
- Authors:
-
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA). Office of Defense Programs (DP); USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP)
- OSTI Identifier:
- 1650620
- Alternate Identifier(s):
- OSTI ID: 1602337; OSTI ID: 1781371; OSTI ID: 1881605
- Report Number(s):
- LA-UR-19-26318; LA-UR-17-29376; LLNL-JRNL-838546
Journal ID: ISSN 1070-664X; TRN: US2202469
- Grant/Contract Number:
- 89233218CNA000001; AC52-07NA27344; AC52-06NA2539; AC52-06NA25396
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 27; Journal Issue: 3; Journal ID: ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Viscosity; turbulence theory and modelling; turbulent flows; computational fluid dynamics; plasmas; fluid mixing; fluid flows; radiography
Citation Formats
Doss, F. W., Flippo, K. A., Merritt, E. C., DeVolder, B. G., Di Stefano, C. A., Huntington, C. M., Kline, J. L., Kot, L., Nagel, S. R., Rasmus, A. M., and Schmidt, D. W. Three-dimensional signatures of self-similarity in a high-energy-density plasma shear-driven mixing layer. United States: N. p., 2020.
Web. doi:10.1063/1.5122980.
Doss, F. W., Flippo, K. A., Merritt, E. C., DeVolder, B. G., Di Stefano, C. A., Huntington, C. M., Kline, J. L., Kot, L., Nagel, S. R., Rasmus, A. M., & Schmidt, D. W. Three-dimensional signatures of self-similarity in a high-energy-density plasma shear-driven mixing layer. United States. https://doi.org/10.1063/1.5122980
Doss, F. W., Flippo, K. A., Merritt, E. C., DeVolder, B. G., Di Stefano, C. A., Huntington, C. M., Kline, J. L., Kot, L., Nagel, S. R., Rasmus, A. M., and Schmidt, D. W. Mon .
"Three-dimensional signatures of self-similarity in a high-energy-density plasma shear-driven mixing layer". United States. https://doi.org/10.1063/1.5122980. https://www.osti.gov/servlets/purl/1650620.
@article{osti_1650620,
title = {Three-dimensional signatures of self-similarity in a high-energy-density plasma shear-driven mixing layer},
author = {Doss, F. W. and Flippo, K. A. and Merritt, E. C. and DeVolder, B. G. and Di Stefano, C. A. and Huntington, C. M. and Kline, J. L. and Kot, L. and Nagel, S. R. and Rasmus, A. M. and Schmidt, D. W.},
abstractNote = {A hydrodynamic shear mixing layer experiment at the National Ignition Facility had previously demonstrated Eulerian scaling of integrated, late-time quantities, including turbulent kinetic energy. In this manuscript, the experiment is repeated with new materials. In this work, using the new dataset, we demonstrate that Euler-number scalings hold not just for late time, but dynamically throughout the experiment, for measurements in all three spatial dimensions. Incorporating the dynamic scaling leads to an enhanced calculation that the heavier of the two scaled experiments has approached three generations of mergers of its primary instability's structures and a consistent observation of such a merger in action in the lighter of the two scaled experiments. Furthermore, the improved scrutiny of the time evolution of instability structures leads to sharper estimates of turbulent kinetic energy, including a demonstration of different behaviors correlating with surface roughness (quantitatively consistent with transitions between laminar and turbulent initial states), as predicted by a Reynolds-averaged turbulent model, which evidently correctly handles the differing shock-roughness interactions to drive its internal state of the model into different regimes. Altogether, a picture arises of the analytical improvements in treating these variations (of times, densities, and roughnesses) as a unified whole and of multiple ways by which deviations from the scaling could indicate an onset of non-hydrodynamic behavior. Such deviations were not expected for these experiments (which models correctly indicated would remain hydrodynamic) but could be introduced by, for example, imposing external fields or increasing drive energy to test conditions relevant to inertial confinement fusion or other high-energy-density experiments.},
doi = {10.1063/1.5122980},
journal = {Physics of Plasmas},
number = 3,
volume = 27,
place = {United States},
year = {Mon Mar 02 00:00:00 EST 2020},
month = {Mon Mar 02 00:00:00 EST 2020}
}
Web of Science
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