The Sedov Blast Wave as a Radial Piston Verification Test

Journal Article · Wed Jun 22 00:00:00 EDT 2016 · Journal of Verification, Validation and Uncertainty Quantification

DOI:https://doi.org/10.1115/1.4033652· OSTI ID:1338730

Pederson, Clark ^[1]; Brown, Bart ^[1]; Morgan, Nathaniel ^[1]

---

1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). XCP-Computational Physics Division

The Sedov blast wave is of great utility as a verification problem for hydrodynamic methods. The typical implementation uses an energized cell of finite dimensions to represent the energy point source. We avoid this approximation by directly finding the effects of the energy source as a boundary condition (BC). Furthermore, the proposed method transforms the Sedov problem into an outward moving radial piston problem with a time-varying velocity. A portion of the mesh adjacent to the origin is removed and the boundaries of this hole are forced with the velocities from the Sedov solution. This verification test is implemented on two types of meshes, and convergence is shown. Our results from the typical initial condition (IC) method and the new BC method are compared.

• Research Organization: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC52-06NA25396
• OSTI ID: 1338730
• Report Number(s): LA-UR--15-27276
• Journal Information: Journal of Verification, Validation and Uncertainty Quantification, Journal Name: Journal of Verification, Validation and Uncertainty Quantification Journal Issue: 3 Vol. 1; ISSN 2377-2158
• Publisher: ASME
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
97 MATHEMATICS AND COMPUTING