报告人：成娟研究员

报告题目：High order entropy stable and positivity-preserving discontinuous Galerkin method for the nonlocal electron heat transport model

报告摘要：

(1) The nonlocal electron heat transport model in laser heated plasmas plays a crucial role in inertial confinement fusion (ICF), and it is important to solve it numerically in an accurate and robust way. In this talk, we develop a class of high-order entropy stable discontinuous Galerkin methods for the nonlocal electron heat transport model. We further design our DG scheme to have the positivity-preserving property by using the scaling positivity-preserving limiter, which is shown, by a computer-aided proof, to have no extra time step constraint than that required by L²stability.

(2) Numerical examples are given to verify the high-order accuracy and positivity-preserving properties of our scheme. By comparing the local and nonlocal electron heat transport models, we also observe more physical phenomena such as the flux reduction and the preheat effect from the nonlocal model.

报告时间：2022年10月29日上午9:00-12:00

报告形式：腾讯会议；会议号：485-488-482

获取会议密码请发邮件至：xiongmeng@hit.edu.cn

报告人简介：成娟，北京应用物理与计算数学研究所研究员，博士生导师。主要从事可压缩流体力学、辐射输运等对流占优偏微分方程的高精度、健壮数值方法研究。现担任“Journal of Computational Physics”期刊编委、北京计算数学学会副理事长、中国工业与应用数学学会（CSIAM）竞赛工作委员会副主任、中国数学会计算数学专业委员会理事等。主持国家自然科学基金重点项目。曾获航空航天工业部科技进步奖二等奖与中国工程物理院科技创新奖二等奖。应邀在“第十七届CSIAM年会”等国内外学术会议上作大会报告。