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Title: Late-Time Mixing Sensitivity to Initial Broadband Surface Roughness in High-Energy-Density Shear Layers

Abstract

Using a large volume high-energy-density fluid shear experiment (8.5 cm3) at the National Ignition Facility, we have demonstrated for the first time the ability to significantly alter the evolution of a supersonic sheared mixing layer by controlling the initial conditions of that layer. By altering the initial surface roughness of the tracer foil, we demonstrate the ability to transition the shear mixing layer from a highly ordered system of coherent structures to a randomly ordered system with a faster growing mix layer, indicative of strong mixing in the layer at a temperature of several tens of electron volts and at near solid density. Simulations using a turbulent-mix model show good agreement with the experimental results and poor agreement without turbulent mix.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP)
OSTI Identifier:
1333335
Alternate Identifier(s):
OSTI ID: 1340918; OSTI ID: 1366916
Report Number(s):
LA-UR-16-22102; LLNL-JRNL-731775
Journal ID: ISSN 0031-9007; PRLTAO; 225001
Grant/Contract Number:  
AC52-06NA25396; AC52-07NA27344
Resource Type:
Published Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Name: Physical Review Letters Journal Volume: 117 Journal Issue: 22; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Flippo, K. A., Doss, F. W., Kline, J. L., Merritt, E. C., Capelli, D., Cardenas, T., DeVolder, B., Fierro, F., Huntington, C. M., Kot, L., Loomis, E. N., MacLaren, S. A., Murphy, T. J., Nagel, S. R., Perry, T. S., Randolph, R. B., Rivera, G., and Schmidt, D. W. Late-Time Mixing Sensitivity to Initial Broadband Surface Roughness in High-Energy-Density Shear Layers. United States: N. p., 2016. Web. doi:10.1103/PhysRevLett.117.225001.
Flippo, K. A., Doss, F. W., Kline, J. L., Merritt, E. C., Capelli, D., Cardenas, T., DeVolder, B., Fierro, F., Huntington, C. M., Kot, L., Loomis, E. N., MacLaren, S. A., Murphy, T. J., Nagel, S. R., Perry, T. S., Randolph, R. B., Rivera, G., & Schmidt, D. W. Late-Time Mixing Sensitivity to Initial Broadband Surface Roughness in High-Energy-Density Shear Layers. United States. https://doi.org/10.1103/PhysRevLett.117.225001
Flippo, K. A., Doss, F. W., Kline, J. L., Merritt, E. C., Capelli, D., Cardenas, T., DeVolder, B., Fierro, F., Huntington, C. M., Kot, L., Loomis, E. N., MacLaren, S. A., Murphy, T. J., Nagel, S. R., Perry, T. S., Randolph, R. B., Rivera, G., and Schmidt, D. W. Wed . "Late-Time Mixing Sensitivity to Initial Broadband Surface Roughness in High-Energy-Density Shear Layers". United States. https://doi.org/10.1103/PhysRevLett.117.225001.
@article{osti_1333335,
title = {Late-Time Mixing Sensitivity to Initial Broadband Surface Roughness in High-Energy-Density Shear Layers},
author = {Flippo, K. A. and Doss, F. W. and Kline, J. L. and Merritt, E. C. and Capelli, D. and Cardenas, T. and DeVolder, B. and Fierro, F. and Huntington, C. M. and Kot, L. and Loomis, E. N. and MacLaren, S. A. and Murphy, T. J. and Nagel, S. R. and Perry, T. S. and Randolph, R. B. and Rivera, G. and Schmidt, D. W.},
abstractNote = {Using a large volume high-energy-density fluid shear experiment (8.5 cm3) at the National Ignition Facility, we have demonstrated for the first time the ability to significantly alter the evolution of a supersonic sheared mixing layer by controlling the initial conditions of that layer. By altering the initial surface roughness of the tracer foil, we demonstrate the ability to transition the shear mixing layer from a highly ordered system of coherent structures to a randomly ordered system with a faster growing mix layer, indicative of strong mixing in the layer at a temperature of several tens of electron volts and at near solid density. Simulations using a turbulent-mix model show good agreement with the experimental results and poor agreement without turbulent mix.},
doi = {10.1103/PhysRevLett.117.225001},
journal = {Physical Review Letters},
number = 22,
volume = 117,
place = {United States},
year = {Wed Nov 23 00:00:00 EST 2016},
month = {Wed Nov 23 00:00:00 EST 2016}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1103/PhysRevLett.117.225001

Citation Metrics:
Cited by: 22 works
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Works referencing / citing this record:

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