| Numerical study of influence of J×B force on melt layer under conditions relevant to ITER ELMs |
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| 引用本文： | 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(4):254-260. |
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| 作者姓名： | 黄艳 孙继忠 蔡娟 孙振月 桑超峰 王德真 |
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| 作者单位： | School of Information Science and Engineering Dalian Polytechnic University;Key Laboratory of Materials Modification by Laser Ion and Electron Beams （Ministry of Education）School of Physics Dalian University of Technology;School of Physics and Electronic Technology Liaoning Normal University |
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| 基金项目： | 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);the National Key Research and Development Program of China(Grant Nos.2017YFA0402500,2017YFE0300400,and 2017YFE0301200) |
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| 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.
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| 关 键 词： | ELMS tungsten DIVERTOR plates J×B FORCE MELT motion |
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