Numerical simulations of onset and growth of Rayleigh–Taylor instability involving solids in converging geometry

Journal Article · Wed Jun 10 00:00:00 UTC 2020 · Physica. D, Nonlinear Phenomena

DOI: https://doi.org/10.1016/j.physd.2020.132607 · OSTI ID:1634955

Chang, Chong H.  ^[1]; Douglass, Rod W. ^[1]

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1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Numerical simulation of Rayleigh–Taylor instabilities involving solids has been carried out in a spherically converging geometry. A solid shell is driven toward the center by high-pressure gas outside. Low-pressure gas inside the shell is then compressed, causing the solid shell to slow down and eventually bounce back. Here, simulation results show the absence of the onset condition unlike in the planar geometry equivalent. Results also show that disturbance growth seems to be strongly associated with the deformation direction instead of the acceleration direction. For example, when the interface is compressed in the cross-stream direction, the disturbance at the gas–solid interface grows even under the Rayleigh–Taylor stable situation.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: 89233218CNA000001
• OSTI ID: 1634955
• Report Number(s): LA-UR--19-25601
• Journal Information: Physica. D, Nonlinear Phenomena, Journal Name: Physica. D, Nonlinear Phenomena Journal Issue: C Vol. 411; ISSN 0167-2789
• Publisher: ElsevierCopyright Statement
• Country of Publication: United States
• Language: English