An extended kinetic model for the thermal force on impurity particles in weakly collisional plasmas

被引：6

作者：

Homma, Yuki ^{[1
,4
]}

Hoshino, Kazuo ^{[2
]}

Tokunaga, Shinsuke ^{[1
]}

Yamoto, Shohei ^{[3
]}

Hatayama, Akiyoshi ^{[3
]}

Asakura, Nobuyuki ^{[1
]}

Sakamoto, Yoshiteru ^{[1
]}

Tobita, Kenji ^{[1
]}

机构：

[1] Natl Inst Quantum & Radiol Sci & Technol, Rokkasho Fus Inst, Aomori, Japan

[2] Natl Inst Quantum & Radiol Sci & Technol, Naka Fus Inst, Ibaraki, Japan

[3] Keio Univ, Grad Sch Sci & Technol, Yokohama, Kanagawa, Japan

[4] 2-166 Omotedate Obuchi, Rokkasho, Aomori 0393212, Japan

来源：

CONTRIBUTIONS TO PLASMA PHYSICS | 2018年 / 58卷 / 6-8期

关键词：

collisionality; heat flux limiter; impurity; thermal force; transport simulation; SCRAPE-OFF LAYER; TEMPERATURE-GRADIENTS; HEAT-TRANSPORT; SIMULATION; PARALLEL; EQUATIONS;

D O I：

10.1002/ctpp.201700173

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：

We have developed an extended kinetic model for the thermal force F delta vertical bar T on test impurity particles in plasmas. This model makes use of a combination of the plasma ion heat flux q(GM) derived from the generalized moment equations (E. Zawaideh et al., Phys. Fluids1988, 31) and the numerical algorithm presented earlier (Y. Homma, A. Hatayama, J. Comput. Phys. 2013, 250). The applicable condition extends from collisional to weakly collisional plasmas, and F delta vertical bar T weakens when the plasma collisionality decreases. A test simulation is performed assuming a tentative weakly collisional plasma. The results show that it can have a non-negligible influence on transient impurity transport in a DEMO-scale tokamak to take into account the effect of plasma collisionality in thermal force modelling.

引用

页码：629 / 637

页数：9

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