题   目：An Asymptotic-Preserving Scheme for Plasma Simulation in Quasi-Neutral and Low-Mach-Number Regimes

主讲人：刘泽宇 博士

单   位：哈尔滨工业大学

时   间：2025年7月9日 14:30

地   点：九章学堂南楼C座302

摘   要：Magnetic confinement fusion research relies heavily on accurate plasma simulations, where multiscale modeling remains a key challenge. This work develops an asymptotic-preserving numerical scheme for Tokamak divertor plasmas described by the Vlasov-BGK-Poisson system. Through dimensionless analysis and macro-micro decomposition, we derive a unified model that naturally transitions to the correct low-Mach-number limit. The proposed scheme combines conservative discretization with asymptotic-preserving techniques to simultaneously resolve quasi-neutrality and low-Mach-number regimes while maintaining accuracy across scales. Our approach provides an effective computational tool for advancing magnetic confinement fusion simulation capabilities.

简   介：哈尔滨工业大学数学学院在读博士。主要研究方向为以磁约束聚变等离子为背景的数值模拟、多尺度计算方法及渐近保持格式设计。（邀请人：李凌霄）