High-order finite-volume modeling of drift waves

Journal Article · Tue Jul 10 00:00:00 EDT 2018 · Journal of Computational Physics

DOI:https://doi.org/10.1016/j.jcp.2018.07.009· OSTI ID:1476214

Dorf, M. ^[1]; Dorr, M. ^[1]; Hittinger, J. ^[1]; Lee, W. ^[2]; Ghosh, D. ^[1]

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1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
2. Univ. of California, San Diego, CA (United States)

The study discusses high-order finite-volume numerical modeling of drift waves, which is an ubiquitous phenomenon in magnetized plasmas. It is found that some standard discretization methods applied to the conservative form of the governing equations can lead to a numerical instability. A method to stabilize high-order discretization is proposed and demonstrated to work in numerical simulations performed with the fourth-order finite-volume code COGENT. As practical examples, a stable drift-wave solution with adiabatic electrons and the collisionless (universal) drift-wave instability driven by electron kinetic effects are considered. Finally, application of the present analysis to a broader range of computational fluid dynamics systems is discussed.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Fusion Energy Sciences (FES)
• Grant/Contract Number: AC52-07NA27344
• OSTI ID: 1476214
• Alternate ID(s): OSTI ID: 1564510
• Report Number(s): LLNL-JRNL-733873; 885907
• Journal Information: Journal of Computational Physics, Vol. 373; ISSN 0021-9991
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

97 MATHEMATICS AND COMPUTING
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
finite-volume method
high-order discretization
incompressible flow
gyrokinetic simulation
drift waves