CTH Calculations of Richtmyer-Meshov Instability Growth

Program Document · Mon Jun 01 00:00:00 EDT 2015

OSTI ID:1240347

Stevens, Gerald D. ^[1]; Vesser, Lynn R. ^[1]

---

1. National Security Technologies, LLC. (NSTec), Mercury, NV (United States)

We have used the hydrodynamics code CTH to simulate Richtmyer-Meshkov (R-M) flow from the surfaces of shock-released samples of copper and tin with parallel sinusoidal grooves across a diameter. For copper, using strength and damage parameters from previous spall recompression experiments, we find good agreement with proton radiographs and velocimetry that show spike and bubble growth, but the ultimate lengths of the spikes are too large. Agreement with experiments can be improved by adding strength to the flow stress model in CTH. For tin, which melted upon shock release in the R-M studies, the strength model does not matter much, and good agreement was obtained there also.

• Research Organization: Nevada Test Site (NTS), Mercury, NV (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP)
• DOE Contract Number: DE-AC52-06NA25946
• OSTI ID: 1240347
• Report Number(s): DOE/NV/25946-2503
• Country of Publication: United States
• Language: English

Related Subjects

Richtmyer-Meshov flow
spall
ejecta
flow stress model