Extension of Landaufluid closure to weakly collisional plasma regime
Abstract
Both collisionless and collisional Landau fluid (LF) closure have been developed and implemented in twofluid plasma simulation framework BOUT++, taking full advantage of the fast nonFourier method (Dimits, 2014). The spectral range of good fit can be conveniently extended to larger domain by adding more Lorentzians. The scaling for upper limit of wavenumber resolved in collisionless LF operator and the fitting coefficients for the collisional LF operator, the later is extended to weakly collisional regime (ν$$^{*}_{e}$$ ~ 0.01), are presented in this paper. The flux limited expression q$$^{FL}_{∥e}$$ is reduced to free streaming expression q$$^{FS}_{∥e}$$ in collisionless limit and gives classical Spitzer–Härm result q$$^{SH}_{∥e}$$ in collisional limit as we expected. The collisional LF closure recovers the classical Spitzer–Härm result q$$^{SH}_{∥e}$$ in collisional limit and is same as the collisionless LF closure in collisionless limit. The test cases also obviously reflect the nonlocal effects from LF closures and responding to different boundary conditions in open surface region. Our report will make it more applicable and possible to include the Landau damping kinetic effect in the fluid simulation of tokamak plasma.
 Authors:

 Peking Univ., Beijing (China); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
 Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
 Peking Univ., Beijing (China)
 Publication Date:
 Research Org.:
 Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
 Sponsoring Org.:
 USDOE Office of Science (SC); USDOE National Nuclear Security Administration (NNSA); National Natural Science Foundations of China (NNSFC); China Scholarship Council
 OSTI Identifier:
 1566023
 Alternate Identifier(s):
 OSTI ID: 1635842
 Report Number(s):
 LLNLJRNL748335
Journal ID: ISSN 00104655; 933485; TRN: US2000959
 Grant/Contract Number:
 AC527NA27344; 2013GB111000; 2013GB112006; 201606010047; 11261140326; 11375053; LLNLJRNL748335
 Resource Type:
 Accepted Manuscript
 Journal Name:
 Computer Physics Communications
 Additional Journal Information:
 Journal Volume: 236; Journal Issue: C; Journal ID: ISSN 00104655
 Publisher:
 Elsevier
 Country of Publication:
 United States
 Language:
 English
 Subject:
 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Parallel heat flux; Landau resonance closure; NonFourier method; Weakly collisional regime; BOUT++
Citation Formats
Chen, J. G., Xu, X. Q., and Lei, Y. A. Extension of Landaufluid closure to weakly collisional plasma regime. United States: N. p., 2018.
Web. https://doi.org/10.1016/j.cpc.2018.10.024.
Chen, J. G., Xu, X. Q., & Lei, Y. A. Extension of Landaufluid closure to weakly collisional plasma regime. United States. https://doi.org/10.1016/j.cpc.2018.10.024
Chen, J. G., Xu, X. Q., and Lei, Y. A. Mon .
"Extension of Landaufluid closure to weakly collisional plasma regime". United States. https://doi.org/10.1016/j.cpc.2018.10.024. https://www.osti.gov/servlets/purl/1566023.
@article{osti_1566023,
title = {Extension of Landaufluid closure to weakly collisional plasma regime},
author = {Chen, J. G. and Xu, X. Q. and Lei, Y. A.},
abstractNote = {Both collisionless and collisional Landau fluid (LF) closure have been developed and implemented in twofluid plasma simulation framework BOUT++, taking full advantage of the fast nonFourier method (Dimits, 2014). The spectral range of good fit can be conveniently extended to larger domain by adding more Lorentzians. The scaling for upper limit of wavenumber resolved in collisionless LF operator and the fitting coefficients for the collisional LF operator, the later is extended to weakly collisional regime (ν$^{*}_{e}$ ~ 0.01), are presented in this paper. The flux limited expression q$^{FL}_{∥e}$ is reduced to free streaming expression q$^{FS}_{∥e}$ in collisionless limit and gives classical Spitzer–Härm result q$^{SH}_{∥e}$ in collisional limit as we expected. The collisional LF closure recovers the classical Spitzer–Härm result q$^{SH}_{∥e}$ in collisional limit and is same as the collisionless LF closure in collisionless limit. The test cases also obviously reflect the nonlocal effects from LF closures and responding to different boundary conditions in open surface region. Our report will make it more applicable and possible to include the Landau damping kinetic effect in the fluid simulation of tokamak plasma.},
doi = {10.1016/j.cpc.2018.10.024},
journal = {Computer Physics Communications},
number = C,
volume = 236,
place = {United States},
year = {2018},
month = {11}
}
Web of Science
Works referencing / citing this record:
An introductory guide to fluid models with anisotropic temperatures. Part 2. Kinetic theory, Padé approximants and Landau fluid closures
journal, December 2019
 Hunana, P.; Tenerani, A.; Zank, G. P.
 Journal of Plasma Physics, Vol. 85, Issue 6