Stability of Contact Discontinuities in Electrostatic Hybrid- and Full-Vlasov Simulations

被引：0

作者：

Tsujine, Naru ^{[1
]}

Haruki, Takayuki ^{[2
]}

Umeda, Takayuki ^{[3
]}

Nariyuki, Yasuhiro ^{[4
]}

Sato, Masahiro ^{[5
]}

机构：

[1] Univ Toyama, Grad Sch Sci & Engn, Toyama 9308555, Japan

[2] Univ Toyama, Acad Assembly, Fac Sustainable Design, Toyama 9308555, Japan

[3] Nagoya Univ, Inst Space Earth Environm Res, Nagoya, Aichi 4648601, Japan

[4] Univ Toyama, Acad Assembly, Fac Educ, Toyama 9308555, Japan

[5] Univ Toyama, Acad Assembly, Fac Engn, Toyama 9308555, Japan

来源：

PLASMA AND FUSION RESEARCH | 2020年 / 15卷

关键词：

contact discontinuity; hybrid simulation; Vlasov simulation; generalized Ohm's law; electron pressure; electron heat flux; SCHEME; MODEL;

D O I：

10.1585/pfr.15.1401002

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The stability of contact discontinuities was studied by means of one-dimensional electrostatic (ES) hybridand full-Vlasov simulations with the initial parameter based on observational data. The ES hybrid-Vlasov simulations show that the sharp gradient of the ion number density is generated at the early stage and is subsequently maintained for a long term. On the other hand, the sharp gradient is absent in the ES full-Vlasov simulation. The generalized Ohm's law shows that the electron pressure gradient accounts for the electric field on the ion time scale in both ES hybrid- and full-Vlasov simulations. It is shown that there is a difference in the time evolution of the electron pressure between the ES hybrid- and full-Vlasov simulations, which is mainly caused by the electron heat flux. (C) 2020 The Japan Society of Plasma Science and Nuclear Fusion Research

引用

页数：6

共 3 条

[1] Stability of contact discontinuities in electrostatic hybrid-and full-vlasov simulations
Tsujine, Naru
Haruki, Takayuki
Umeda, Takayuki
Nariyuki, Yasuhiro
Sato, Masahiro
[J]. Plasma and Fusion Research, 2020, 15
[2] Contact discontinuities in collisionless plasmas: A comparison of hybrid and kinetic simulations
Lapenta, G
Brackbill, JU
[J]. GEOPHYSICAL RESEARCH LETTERS, 1996, 23 (14) : 1713 - 1716
[3] ON THE STABILITY OF ROTATIONAL DISCONTINUITIES - ONE-DIMENSIONAL AND 2-DIMENSIONAL HYBRID SIMULATIONS
KARIMABADI, H
KRAUSSVARBAN, D
OMIDI, N
[J]. GEOPHYSICAL RESEARCH LETTERS, 1995, 22 (21) : 2989 - 2992

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