Numerical study of influence of J×B force on melt layer under conditions relevant to ITER ELMs

doi:10.1088/1674-1056/28/4/045201

中国物理B ›› 2019, Vol. 28 ›› Issue (4): 45201-045201.doi: 10.1088/1674-1056/28/4/045201

• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇下一篇

Numerical study of influence of J×B force on melt layer under conditions relevant to ITER ELMs

Yan Huang(黄艳), Ji-Zhong Sun(孙继忠), Juan Cai(蔡娟), Zhen-Yue Sun(孙振月), Chao-Feng Sang(桑超峰), De-Zhen Wang(王德真)

1 School of Information Science and Engineering, Dalian Polytechnic University, Dalian 116034, China;
2 Key Laboratory of Materials Modification by Laser, Ion and Electron Beams(Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, China;
3 School of Physics and Electronic Technology, Liaoning Normal University, Dalian 116021, China

收稿日期:2018-11-12 修回日期:2019-01-28 出版日期:2019-04-05 发布日期:2019-04-05
通讯作者: Ji-Zhong Sun E-mail:jsun@dlut.edu.cn
基金资助:
Project supported by the Scientific Research Foundation of Liaoning Province, China (Grant No. 2016J027), the Open Research Project of Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Ministry of Education (Grant No. KF1705), and the National Key Research and Development Program of China (Grant Nos. 2017YFA0402500, 2017YFE0300400, and 2017YFE0301200).

Numerical study of influence of J×B force on melt layer under conditions relevant to ITER ELMs

Yan Huang(黄艳)¹, Ji-Zhong Sun(孙继忠)², Juan Cai(蔡娟)³, Zhen-Yue Sun(孙振月)², Chao-Feng Sang(桑超峰)², De-Zhen Wang(王德真)²

1 School of Information Science and Engineering, Dalian Polytechnic University, Dalian 116034, China;
2 Key Laboratory of Materials Modification by Laser, Ion and Electron Beams(Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, China;
3 School of Physics and Electronic Technology, Liaoning Normal University, Dalian 116021, China

Received:2018-11-12 Revised:2019-01-28 Online:2019-04-05 Published:2019-04-05
Contact: Ji-Zhong Sun E-mail:jsun@dlut.edu.cn
Supported by:
Project supported by the Scientific Research Foundation of Liaoning Province, China (Grant No. 2016J027), the Open Research Project of Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Ministry of Education (Grant No. KF1705), and the National Key Research and Development Program of China (Grant Nos. 2017YFA0402500, 2017YFE0300400, and 2017YFE0301200).

摘要/Abstract

摘要：

The influence of the J×B force on the topographical modification of W targets during a type-I-like ELM in ITER has been studied numerically. A two-dimensional (2D) fluid dynamics model is employed by solving liquid hydrodynamic Navier-Stokes equation with the 2D heat conduction equation in addition to driving forces for surface topography, such as surface tension and pressure gradient, the J×B force is particularly addressed. The governing equations are solved with the finite volume method by adequate prediction of the moving solid-liquid interface. Numerical simulations are carried out for a range of type-I ELM characteristic parameters. Our results indicate that both the surface tension and the J×B force contributes to the melt motion of tungsten plates when the energy flux is under 3000 MW·m^-2, the surface tension is a major driving force while the pressure gradient is negligible. Our results also indicate that the J×B force makes the small hills grow at different rates at both the crater edges under a type-I-like ELM heat load with a Gaussian power density profile.

关键词: ELMs, tungsten divertor plates, J×B force, melt motion

Abstract:

Key words: ELMs, tungsten divertor plates, J×B force, melt motion

中图分类号: (Tokamaks, spherical tokamaks)

52.55.Fa

52.55.Rk (Power exhaust; divertors) 52.40.Hf (Plasma-material interactions; boundary layer effects) 52.65.Kj (Magnetohydrodynamic and fluid equation)

黄艳, 孙继忠, 蔡娟, 孙振月, 桑超峰, 王德真. Numerical study of influence of J×B force on melt layer under conditions relevant to ITER ELMs[J]. 中国物理B, 2019, 28(4): 45201-045201.

Yan Huang(黄艳), Ji-Zhong Sun(孙继忠), Juan Cai(蔡娟), Zhen-Yue Sun(孙振月), Chao-Feng Sang(桑超峰), De-Zhen Wang(王德真). Numerical study of influence of J×B force on melt layer under conditions relevant to ITER ELMs[J]. Chin. Phys. B, 2019, 28(4): 45201-045201.

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Numerical study of influence of J×B force on melt layer under conditions relevant to ITER ELMs

Numerical study of influence of J×B force on melt layer under conditions relevant to ITER ELMs

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