skip to main content


Title: Strength and viscosity effects on perturbed shock front stability in metals

Here, computational modeling and experimental measurements on metal samples subject to a laser-driven, ablative Richtmyer-Meshkov instability showed differences between viscosity and strength effects. In particular, numerical and analytical solutions, coupled with measurements of fed-through perturbations, generated by perturbed shock fronts onto initially flat surfaces, show promise as a validation method for models of deviatoric response in the post shocked material. Analysis shows that measurements of shock perturbation amplitudes at low sample thickness-to-wavelength ratios are not enough to differentiate between strength and viscosity effects, but that surface displacement data of the fed-through fed-thru perturbations appears to resolve the ambiguity. Additionally, analytical and numerical results show shock front perturbation evolution dependence on initial perturbation amplitude and wavelength is significantly different in viscous and materials with strength, suggesting simple experimental geometry changes should provide data supporting one model or the other.
 [1] ;  [2] ;  [1] ;  [2] ;  [2]
  1. Arizona State Univ., Tempe, AZ (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Report Number(s):
LA-UR-16-27117; DOE-ASU-02005-4
Journal ID: ISSN 0031-9007; PRLTAO; TRN: US1702730
Grant/Contract Number:
SC0008683; AC52-06NA25396; NA0002005
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 118; Journal Issue: 19; Journal ID: ISSN 0031-9007
American Physical Society (APS)
Research Org:
Arizona State Univ., Tempe, AZ (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24); USDOE Office of Science (SC). Fusion Energy Sciences (FES) (SC-24); USDOE National Nuclear Security Administration (NNSA)
Contributing Orgs:
Los Alamos National Laboratory
Country of Publication:
United States
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; shocks; hydrodynamic instabilities; strength; viscosity; Hydrodynamic instability; perturbed shock
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1356277; OSTI ID: 1369184; OSTI ID: 1460717