| Autor: |
Freeman, Matthew S., Rousculp, Chris, Oro, David, Kreher, Seth, Baolian Cheng, Griego, Jeffrey, Patten, Austin, Neukirch, Levi, Reinovsky, Robert, Turchi, Peter, Bradley III, Joseph, Reass, William, Fierro, Franklin, Randolph, Randall, Donovan, Patrick, Saunders, Alexander, Mariam, Fesseha, Zhaowen Tang |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2018, Vol. 1979 Issue 1, p080005-1-080005-5, 5p |
| Abstrakt: |
The LANL PHELIX pulsed-power driven liner implosion apparatus is fielded to measure the growth of Richtmyer-Meshkov instabilities (RMIs) in a cylindrical geometry under the conditions of liquid (Cren-1), mixed-state (Cren-2), and solid (Cren-3) release. 2D Lagrangian hydrocode simulations of this imploding geometry are compared against 800-MeV proton radiography data of the RMI growth. The liquid release (>35 GPa) was achieved with a liner velocity of 3 km s-1, and demonstrates a linear, continuous spike growth that agrees with the model. The mixed release (20 - 35 GPa) was achieved with a liner velocity of 1.4 km s-1 and demonstrates growth stagnation with time, due to increased transit time effects. The solid release (<20 GPa), achieved with a liner velocity of 0.8 km s-1, also demonstrates growth stagnation, while also showing an effect not predicted by the model, in that some peaks, at late time, disappear completely, while other, central, peaks, grow disproportionately large, due to RMI bubble merger behavior. These experiments demonstrate a broad parameter space in which to study RMIs in a cylindrical geometry, and a rich dataset against which to validate and inform future iterations of the simulation. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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