Incorporating kinetic effects on Nernst advection in inertial fusion simulations

被引：20

作者：

Brodrick, J. P. ^{[1
]}

Sherlock, M. ^{[2
]}

Farmer, W. A. ^{[2
]}

Joglekar, A. S. ^{[3
]}

Barrois, R. ^{[4
]}

Wengraf, J. ^{[5
]}

Bissell, J. J. ^{[6
]}

Kingham, R. J. ^{[7
]}

Del Sorbo, D. ^{[1
]}

Read, M. P. ^{[1
]}

Ridgers, C. P. ^{[1
]}

机构：

[1] Univ York, Dept Phys, York Plasma Inst, York YO10 5DD, N Yorkshire, England

[2] Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA USA

[3] Univ Calif Los Angeles, Los Angeles, CA USA

[4] Univ Technol, Eindhoven, Netherlands

[5] Univ Manchester, Manchester, Lancs, England

[6] Univ Bath, Bath, Avon, England

[7] Imperial Coll London, Blackett Lab, Plasma Grp, London SW7 2AZ, England

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2018年 / 60卷 / 08期

基金：

英国工程与自然科学研究理事会; 美国国家科学基金会;

关键词：

Nernst; transport; nonlocal; LASER-PRODUCED PLASMAS; NONLOCAL ELECTRON-TRANSPORT; FOKKER-PLANCK EQUATION; MAGNETIC-FIELDS; HEAT-TRANSPORT; ION SOUND; MODEL; CODE;

D O I：

10.1088/1361-6587/aaca0b

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 present a simple method to incorporate nonlocal effects on the Nernst advection of magnetic fields down steep temperature gradients, and demonstrate its effectiveness in a number of inertial fusion scenarios. This is based on assuming that the relationship between the Nernst velocity and the heat flow velocity is unaffected by nonlocality. The validity of this assumption is confirmed over a wide range of plasma conditions by comparing Vlasov-Fokker-Planck and flux-limited classical transport simulations. Additionally, we observe that the Righi-Leduc heat flow is more severely affected by nonlocality due to its dependence on high velocity moments of the electron distribution function, but are unable to suggest a reliable method of accounting for this in fluid simulations.

引用

页数：15

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