Abstract Details
Verification of numerical models of radiative shocks using the CRASH code
Author: Eric S. Myra
Requested Type: Poster Only
Submitted: 2009-04-15 16:20:11
Co-authors: R.P. Drake, B. Fryxell, J.P. Holloway, B. Van der Holst, K.G. Powell, I. Sokolov, Q.F. Stout, G. Toth, M.L. Adams, W.D. Hawkins, R.G. McClarren, J.E. Morel
Contact Info:
University of Michigan
2455 Hayward Street
Ann Arbor, MI 48109
USA
Abstract Text:
The Center for Radiative Shock Hydrodynamics (CRASH) seeks to improve the predictive capability of models for shock waves produced in Xe or Ar when a laser is used to shock, ionize, and accelerate a Be plate into a gas-filled shock tube. These shocks, when driven above a threshold velocity of about 100 km/s, become strongly radiative and convert most of the incoming energy flux into radiation.
The CRASH code, which is used to simulate these experiments, includes contributions from several existing and developing codebases: (i) BATSRUS (a 3D, adaptive, MHD code from the University of Michigan), (ii) PDT (discrete-ordinates radiation-transport code from Texas A&M University), (iii) a flux-limited-diffusion implementation of radiation hydrodynamics, (iv) code for employing material-properties data (equations of state, opacities, etc.), and (v) a package for making simulated radiographs to compare to experimental data.
To ensure both accurate simulation and code implementation, extensive verification and validation is required. In this presentation, we outline key tests in our verification procedure and illustrate some of the more interesting test problems in greater detail.
We gratefully acknowledge the support of the U.S. Dept. of Energy NNSA under the Predictive Science Academic Alliance Program by grant DE-FC52-08NA28616, under the Stewardship Sciences Academic Alliances program by grant DE-FG52-04NA00064, and under the National Laser User Facility by grant DE-FG03–00SF22021.
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