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

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

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.

Affiliation

Flippo KA; Physics Division, Plasma Physics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Doss FW; Theoretical Design Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Kline JL; Physics Division, Plasma Physics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Merritt EC; Physics Division, Plasma Physics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Capelli D; Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Cardenas T; Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
DeVolder B; Computational Physics Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Fierro F; Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Huntington CM; Lawrence Livermore National Laboratory, Livermore, California 94550-9234, USA.
Kot L; Physics Division, Plasma Physics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Loomis EN; Physics Division, Plasma Physics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
MacLaren SA; Lawrence Livermore National Laboratory, Livermore, California 94550-9234, USA.
Murphy TJ; Physics Division, Plasma Physics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Nagel SR; Lawrence Livermore National Laboratory, Livermore, California 94550-9234, USA.
Perry TS; Physics Division, Plasma Physics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Randolph RB; Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Rivera G; Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Schmidt DW; Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.

Phys Rev Lett ; 117(22): 225001, 2016 Nov 25.

Article de En | MEDLINE | ID: mdl-27925731

ABSTRACT

ABSTRACT

Using a large volume high-energy-density fluid shear experiment (8.5 cm^{3}) 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.

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Collection: 01-internacional Base de données: MEDLINE Type d'étude: Diagnostic_studies Langue: En Journal: Phys Rev Lett Année: 2016 Type de document: Article Pays d'affiliation: États-Unis d'Amérique

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