Impact of Sheath Boundary Conditions and Magnetic Flutter on Evolution and Distribution of Transient Particle and Heat Fluxes in the Edge-Localized Mode Burst by Experimental Advanced Superconducting Tokamak Simulation

作     者：Yan-Bin Wu Tian-Yang Xia Fang-Chuan Zhong Bin Gui EAST Team 吴彦斌;夏天阳;钟方川;桂彬;EAST Team

作者机构：College of ScienceDonghua UniversityShanghai 201620 School of Physics and Electronic EngineeringAnqing Normal UniversityAnqing 246133 Institute of Plasma PhysicsChinese Academy of SciencesHefei 230031 不详 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2019年第36卷第4期

页      面：51-55页

核心收录：

学科分类：08[工学] 082701[工学-核能科学与工程] 0827[工学-核科学与技术] 

基　　金：the National Key R&D Program of China under Grant Nos 2017YFE0301100,2017YFE0301101,2017YFE0301104 and 2014GB106001 the National Natural Science Foundation of China under Grant Nos 11275047,11675217,11505236 and 11405215 the Youth Innovation Promotion Association Chinese Academy of Sciences under Grant No 2017479,and the K.C.Wong Education Foundation 

主　　题：evolution distribution conditions 

摘      要：To study the evolution and distribution of the transient particle and heat fluxes during the edge-localized modes(ELMs) burst on the experimental advanced superconducting tokamak(EAST), the BOUT++six-field two-fluid model with sheath boundary conditions(SBCs) and magnetic flutter terms in the parallel thermal conduction is used to simulate the evolution of the profiles and growing process of the fluxes at divertor targets. Although SBCs hardly play a role in the linear phase, in the nonlinear phase both SBCs and magnetic flutter can change the dominant toroidal mode. SBCs are able to broaden the frequency distribution of the turbulence. The magnetic flutter increases the ELM size from 2.8% to 8.4%, and it doubles the amplitudes of the radial heat and particle transport coefficients at outer midplane(OMP), at around 1.0 m^2 s^(-1). It is then able to increase the particle and heat flux at the divertor targets and to broaden the radial distribution of the parallel heat flux towards the targets.