Seminars on Numerical Algorithms, Analyses, and Applications:Structure-preserving spectral methods with exact curl/divergence-free constraints for plasma simulations
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:杨志国(上海交通大学)
:2022-12-16 10:00
:腾讯会议ID:795-762-597(无密码)
报告人:杨志国(上海交通大学)
时 间:12月16日上午10:00-11:30
地 点:腾讯会议ID:795-762-597(无密码)
内容摘要:
In this talk, we present H^1-, H(div) and H(curl)-conforming spectral method with exact preservation of the curl/divergence-free constraints for two typical PDEs arising from plasma simulations. One is the incompressible visco-resistive MHD system and the other one is the Vlasov-Ampere system. Two key ingredients, i.e. exact de Rham complexes and their commuting diagram, and the derivative property of the generalized Jacobi polynomials are essential for the derivation of the desired basis functions. Besides, several novel second-order energy-stable or energy-conserving time discretization schemes are proposed. Ample 2D and 3D numerical examples illustrate both the accuracy of the structure-preserving basis functions and the efficiency of the proposed schemes.
个人简介:
杨志国,2017年博士毕业于新加坡南洋理工大学,2017-2020年于美国普渡大学任职访问助理教授,2020年加入上海交通大学数学院任副教授。报告人长期从事谱与谱元方法、电磁学与流体力学领域的保结构数值算法的研究工作。研究成果发表于计算数学的高水平期刊如SIAM系列、JCP、CMAME、JSC等。入选2020年上海海外高层次人才引进计划,2021年入选国家青年特聘专家,主持上海市科技创新扬帆计划基金、国自然青年科学基金,参与中科院先导专项等研究课题。
联系人:陈黄鑫
