The Sedov Test Problem

Technical Report · Mon Jun 25 00:00:00 EDT 2012

DOI:https://doi.org/10.2172/1044837· OSTI ID:1044837

Fung, Jimmy ^[1]; Masser, Thomas ^[1]; Morgan, Nathaniel R. ^[1]

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1. Los Alamos National Laboratory

The Sedov test is classically defined as a point blast problem. The Sedov problem has led us to advances in algorithms and in their understanding. Vorticity generation can be physical or numerical. Both play a role in Sedov calculations. The RAGE code (Eulerian) resolves the shock well, but produces vorticity. The source definition matters. For the FLAG code (Lagrange), CCH is superior to SGH by avoiding spurious vorticity generation. FLAG SGH currently has a number of options that improve results over traditional settings. Vorticity production, not shock capture, has driven the Sedov work. We are pursuing treatments with respect to the hydro discretization as well as to artificial viscosity.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: DOE/LANL
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 1044837
• Report Number(s): LA-UR-12-22460; TRN: US201214%%1019
• Country of Publication: United States
• Language: English

Related Subjects

97 MATHEMATICAL METHODS AND COMPUTING
ALGORITHMS
PRODUCTION
VISCOSITY