Interfacial mixing in high-energy-density matter with a multiphysics kinetic model
Abstract
We have extended here a recently developed multispecies, multitemperature Bhatnagar-Gross-Krook model [Haack et al., J. Stat. Phys. 168, 822 (2017)], to include multiphysics capabilities that enable modeling of a wider range of physical conditions. In terms of geometry, we have extended from the spatially homogeneous setting to one spatial dimension. In terms of the physics, we have included an atomic ionization model, accurate collision physics across coupling regimes, self-consistent electric fields, and degeneracy in the electronic screening. We apply the model to a warm dense matter scenario in which the ablator-fuel interface of an inertial confinement fusion target is heated, but for larger length and time scales and for much higher temperatures than can be simulated using molecular dynamics. Relative to molecular dynamics, the kinetic model greatly extends the temperature regime and the spatiotemporal scales over which we are able to model. In our numerical results we observe hydrogen from the ablator material jetting into the fuel during the early stages of the implosion and compare the relative size of various diffusion components (Fickean diffusion, electrodiffusion, and barodiffusion) that drive this process. We also examine kinetic effects, such as anisotropic distributions and velocity separation, in order to determine when thismore »
- Authors:
-
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Computational and Applied Mathematics Group; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Mathematics
- Michigan State Univ., East Lansing, MI (United States). Dept. of Computational Mathematics, Science and Engineering
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)
- OSTI Identifier:
- 1514956
- Alternate Identifier(s):
- OSTI ID: 1414510
- Report Number(s):
- LA-UR-17-25906
Journal ID: ISSN 2470-0045
- Grant/Contract Number:
- AC52-06NA25396; AC05-00OR22725
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Physical Review E
- Additional Journal Information:
- Journal Volume: 96; Journal Issue: 6; Journal ID: ISSN 2470-0045
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; high-energy-density plasmas; inertial confinement fusion; plasma transport; plasma kinetic theory
Citation Formats
Haack, Jeffrey R., Hauck, Cory D., and Murillo, Michael S. Interfacial mixing in high-energy-density matter with a multiphysics kinetic model. United States: N. p., 2017.
Web. doi:10.1103/PhysRevE.96.063310.
Haack, Jeffrey R., Hauck, Cory D., & Murillo, Michael S. Interfacial mixing in high-energy-density matter with a multiphysics kinetic model. United States. https://doi.org/10.1103/PhysRevE.96.063310
Haack, Jeffrey R., Hauck, Cory D., and Murillo, Michael S. 2017.
"Interfacial mixing in high-energy-density matter with a multiphysics kinetic model". United States. https://doi.org/10.1103/PhysRevE.96.063310. https://www.osti.gov/servlets/purl/1514956.
@article{osti_1514956,
title = {Interfacial mixing in high-energy-density matter with a multiphysics kinetic model},
author = {Haack, Jeffrey R. and Hauck, Cory D. and Murillo, Michael S.},
abstractNote = {We have extended here a recently developed multispecies, multitemperature Bhatnagar-Gross-Krook model [Haack et al., J. Stat. Phys. 168, 822 (2017)], to include multiphysics capabilities that enable modeling of a wider range of physical conditions. In terms of geometry, we have extended from the spatially homogeneous setting to one spatial dimension. In terms of the physics, we have included an atomic ionization model, accurate collision physics across coupling regimes, self-consistent electric fields, and degeneracy in the electronic screening. We apply the model to a warm dense matter scenario in which the ablator-fuel interface of an inertial confinement fusion target is heated, but for larger length and time scales and for much higher temperatures than can be simulated using molecular dynamics. Relative to molecular dynamics, the kinetic model greatly extends the temperature regime and the spatiotemporal scales over which we are able to model. In our numerical results we observe hydrogen from the ablator material jetting into the fuel during the early stages of the implosion and compare the relative size of various diffusion components (Fickean diffusion, electrodiffusion, and barodiffusion) that drive this process. We also examine kinetic effects, such as anisotropic distributions and velocity separation, in order to determine when this problem can be described with a hydrodynamic model.},
doi = {10.1103/PhysRevE.96.063310},
url = {https://www.osti.gov/biblio/1514956},
journal = {Physical Review E},
issn = {2470-0045},
number = 6,
volume = 96,
place = {United States},
year = {Thu Dec 21 00:00:00 EST 2017},
month = {Thu Dec 21 00:00:00 EST 2017}
}
Web of Science
Figures / Tables:
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