报告地点:行健楼学术活动室526
邀请人:王雨顺教授
报告摘要:The talk presents a second-order accurate direct Eulerian generalized Riemann problem (GRP) scheme for the ten-moment Gaussian closure equations with source terms. The generalized Riemann invariants associated with the rarefaction waves, the contact discontinuity and the shear waves are given, and the 1D exact Riemann solver is obtained. After that, the generalized Riemann invariants and the Rankine-Hugoniot jump conditions are directly used to resolve the left and right nonlinear waves (rarefaction wave and shock wave) of the local GRP in Eulerian formulation, and then the 1D direct Eulerian GRP scheme is derived. They are much more complicated, technical and nontrivial due to more physical variables and elementary waves. Some 1D and 2D numerical experiments are presented to check the accuracy and high resolution of the proposed GRP schemes, where the 2D direct Eulerian GRP scheme is given by using the Strang splitting method for simplicity. It should be emphasized that several examples of 2D Riemann problems are constructed for the first time. It is a joint work with Mr. Jiangfu Wang.
个人介绍:汤华中,北京大学网赌
博雅特聘教授,博士生导师。1990年6月获苏州大学的数学教育学士学位,1993年3月获南京航空航天大学的计算数学硕士学位,1996年5月获南京航空航天大学的空气动力学博士学位。2021年10月当选中国工业与应用数学学会的会士。现任中国工业与应用数学学会副理事长,Journal of Computational Physics、International Journal for Numerical Methods in Fluids,East Asia Journal on Applied Mathematics,《计算物理》,《气体物理》和《信息与计算科学丛书》等编委。曾兼任南昌航空大学党委常委、副校长和湘潭大学数学与计算科学学院院长,期刊《计算数学》的三届副主编。曾获国家杰出青年科学基金、冯康科学计算奖、德国洪堡基金研究奖学金和教育部高校科学技术奖自然科学一等奖等。
主要从事科学与工程计算、双曲型守恒律方程数值方法、流体力学中数值方法等的研究,发表百余篇学术论文,合作编写中科院研究生教材一部(第一版2003,第二版2018)。曾主持国家杰出青年科学基金项目和国家自然科学基金委员会的重大研究计划的重点支持项目等,曾担任国家重点研发计划项目的课题组长和国防基础科研核基础科学挑战专题某领域的院外首席专家,曾参与国家自然科学基金委的海外青年学者合作研究基金、重点项目和创新群体项目,科技部973项目和航天863项目等。