Accuracy and convergence of coupled finite-volume/Monte Carlo codes for plasma edge simulations of nuclear fusion reactors

被引：26

作者：

Ghoos, K. ^{[1
]}

Dekeyser, W. ^{[1
]}

Samaey, G. ^{[2
]}

Boerner, P. ^{[3
]}

Baelmans, M. ^{[1
]}

机构：

[1] Katholieke Univ Leuven, Dept Mech Engn, Celestijnenlaan 300A, B-3001 Leuven, Belgium

[2] Katholieke Univ Leuven, Dept Comp Sci, Celestijnenlaan 200A, B-3001 Leuven, Belgium

[3] FZ Julich GmbH, Inst Energy & Climate Res IEK 4, D-52425 Julich, Germany

来源：

JOURNAL OF COMPUTATIONAL PHYSICS | 2016年 / 322卷

关键词：

Fusion; Monte Carlo; Plasma edge; ITER;

D O I：

10.1016/j.jcp.2016.06.049

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

The plasma and neutral transport in the plasma edge of a nuclear fusion reactor is usually simulated using coupled finite volume (FV)/Monte Carlo (MC) codes. However, under conditions of future reactors like ITER and DEMO, convergence issues become apparent. This paper examines the convergence behaviour and the numerical error contributions with a simplified FV/MC model for three coupling techniques: Correlated Sampling, Random Noise and Robbins Monro. Also, practical procedures to estimate the errors in complex codes are proposed. Moreover, first results with more complex models show that an order of magnitude speedupcan be achieved without any loss in accuracy by making use of averaging in the Random Noise coupling technique. (C) 2016 Elsevier Inc. All rights reserved.

引用

页码：162 / 182

页数：21

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