报告题目：PIFE-PIC: Parallel Immersed-Finite-Element Particle-in-Cell for 3-D kinetic simulations of plasma-material interactions

报告人：何晓明 教授（密苏里科技大学）

报告时间：2023年7月19日（星期三） 10:30-12:00

报告地点：海山楼（创新园大厦）A1101

校内联系人：于波 教授

报告摘要： In this presentation, we present a recently developed particle simulation too PIFE-PIC, which is a novel three-dimensional (3-D) Parallel Immersed-Finite-Element (IFE) Particle-in-Cell (PIC) simulation model for particle simulations of plasma-material interactions. This framework is based on the recently developed non-homogeneous electrostatic IFE-PIC method, which is designed to handle complex plasma-material interface conditions associated with irregular geometries using a Cartesian-mesh-based PIC. Three-dimensional domain decomposition is utilized for both the electrostatic field solver with IFE and the particle operations in PIC to distribute the computation among multiple processors. A simulation of the orbital-motion-limited (OML) sheath of a dielectric sphere immersed in a stationary plasma is carried out to validate PIFE-PIC and profile the parallel performance of the code package. Parallel efficiency up to approximately 110 superlinear speedup was achieved for strong scaling test. Furthermore, a large-scale simulation of plasma charging at a lunar crater containing 2 million PIC cells (10 million FE/IFE cells) and about 1 billion particles, running for 20,000 PIC steps in about 154 wall-clock hours, is presented to demonstrate the high-performance computing capability of PIFE-PIC.

报告人简介：何晓明，2002 年与 2005 年在四川大学数学学院分别获学士与硕士学位，2009 年在弗吉尼亚理工大学数学系获博士学位，2009 年至 2010 年在佛罗里达州立大学作博士后。2010 年至 2016年在美国密苏里科技大学任助理教授，2016 年晋升为副教授并获终身教职，2021 年晋升为正教授。2018 年获得 Humboldt Research Fellowship for Experienced Researchers。担任计算数学领域国际期刊 International Journal of Numerical Analysis & Modeling 的Managing editor。从 2012 年起主持了多项由美国国家科学基金会和美国能源部资助的科研项目。2014-2016 年担任 SIAM 美国中部分会的第一任主席和前两届年会的组织委员会主席。2019 年起担任 Midwest Numerical Analysis Day 的组织委员成员。2021 年 1 月起担任 SIAM Committee on Programs and Conferences 成员。2021 年 7 月起担任密苏里科技大学 Faculty Fellow to Vice Chancellor of Research and Innovation。何晓明教授主要的研究领域是计算科学与工程。研究问题主要包括界面问题，计算流体力学，计算电磁学，有限元方法，各类解耦算法，数据同化，随机偏微分方程，控制问题等。他将计算数学与实际工程应用问题结合起来，在科学计算和应用领域做了大量的工作,在 SIAM Journal on Scientific Computing，Journal of Computational Physics，Computer Methods in Applied Mechanics and Engineering, SIAM Journal on Numerical Analysis，Mathematics of Computation，Numerische Mathematik，IEEE Transactions on Plasma Science, Lab on a Chip等杂志发表论文 90 余篇。