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Title: A Rigorous Verification Strategy for a Continuum Plasma Code.

Abstract

Abstract not provided.

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1399198
Report Number(s):
SAND2016-9954C
648011
DOE Contract Number:
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Proposed for presentation at the NECDC 2016 held October 17-21, 2016 in Livermore, CA.
Country of Publication:
United States
Language:
English

Citation Formats

Kramer, Richard Michael Jack, Miller, Sean, Niederhaus, John Henry, Radtke, Gregg Arthur, Bettencourt, Matthew Tyler, Cartwright, Keith, Cyr, Eric C, Phillips, Edward Geoffrey, Robinson, Allen C., and Shadid, John N. A Rigorous Verification Strategy for a Continuum Plasma Code.. United States: N. p., 2016. Web.
Kramer, Richard Michael Jack, Miller, Sean, Niederhaus, John Henry, Radtke, Gregg Arthur, Bettencourt, Matthew Tyler, Cartwright, Keith, Cyr, Eric C, Phillips, Edward Geoffrey, Robinson, Allen C., & Shadid, John N. A Rigorous Verification Strategy for a Continuum Plasma Code.. United States.
Kramer, Richard Michael Jack, Miller, Sean, Niederhaus, John Henry, Radtke, Gregg Arthur, Bettencourt, Matthew Tyler, Cartwright, Keith, Cyr, Eric C, Phillips, Edward Geoffrey, Robinson, Allen C., and Shadid, John N. 2016. "A Rigorous Verification Strategy for a Continuum Plasma Code.". United States. doi:. https://www.osti.gov/servlets/purl/1399198.
@article{osti_1399198,
title = {A Rigorous Verification Strategy for a Continuum Plasma Code.},
author = {Kramer, Richard Michael Jack and Miller, Sean and Niederhaus, John Henry and Radtke, Gregg Arthur and Bettencourt, Matthew Tyler and Cartwright, Keith and Cyr, Eric C and Phillips, Edward Geoffrey and Robinson, Allen C. and Shadid, John N.},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2016,
month =
}

Conference:
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  • The numerical simulation of plasmas is a critical tool for inertial confinement fusion (ICF). We have been working to improve the predictive capability of a continuum laser plasma interaction code pF3d, which couples a continuum hydrodynamic model of an unmagnetized plasma to paraxial wave equations modeling the laser light. Advanced numerical techniques such as local mesh refinement, multigrid, and multifluid Godunov methods have been adapted and applied to nonlinear heat conduction and to multifluid plasma models. We describe these algorithms and briefly demonstrate their capabilities.
  • As scientific codes become more complex and involve larger numbers of developers and algorithms, chances for algorithmic implementation mistakes increase. In this environment, code verification becomes essential to building confidence in the code implementation. This paper will present first results of a new code verification effort within LLNL's B Division. In particular, we will show results of code verification of the LLNL ASC ARES code on the test problems: Su Olson non-equilibrium radiation diffusion, Sod shock tube, Sedov point blast modeled with shock hydrodynamics, and Noh implosion.
  • In the present work, a Verification and Validation procedure is presented and applied showing, through a practical example, how it can contribute to advancing our physics understanding of plasma turbulence. Bridging the gap between plasma physics and other scientific domains, in particular, the computational fluid dynamics community, a rigorous methodology for the verification of a plasma simulation code is presented, based on the method of manufactured solutions. This methodology assesses that the model equations are correctly solved, within the order of accuracy of the numerical scheme. The technique to carry out a solution verification is described to provide a rigorousmore » estimate of the uncertainty affecting the numerical results. A methodology for plasma turbulence code validation is also discussed, focusing on quantitative assessment of the agreement between experiments and simulations. The Verification and Validation methodology is then applied to the study of plasma turbulence in the basic plasma physics experiment TORPEX [Fasoli et al., Phys. Plasmas 13, 055902 (2006)], considering both two-dimensional and three-dimensional simulations carried out with the GBS code [Ricci et al., Plasma Phys. Controlled Fusion 54, 124047 (2012)]. The validation procedure allows progress in the understanding of the turbulent dynamics in TORPEX, by pinpointing the presence of a turbulent regime transition, due to the competition between the resistive and ideal interchange instabilities.« less