活动名称：PANGU I:A Parthenon-Based Framework for Fixed-Spacetime GRMHD

时间：2026年9月20日（星期日）时间点15:10

地点：博雅楼 503

主讲人：郭敏勇

主办单位：重庆师范大学物理与光电工程学院

主讲人简介：张玉鹏，兰州大学物理学院青年研究员、博士生导师，主要从事引力波与数值相对论、黑洞及玻色星物理研究，重点关注玻色星、标量毛黑洞和标量云环境下双黑洞的动力学。基于数值相对论与动态时空测地线方法，揭示玻色星塌缩和迁移中的轨道响应及黑洞阴影形成机制；通过全非线性演化研究黑洞动态标量化、轴子毛形成及超辐射不稳定性；发现高密度标量环境可加速双黑洞并合，并产生近千公里每秒的反冲速度。

活动简介：PANGU—Parthenon-Based Astrophysics for Numerical Relativity and General-Relativistic Magnetohydrodynamics (GRMHD) in a Unified Framework—is a modular computational framework for relativistic astrophysical simulations. In this first paper, we present and validate the fixed-spacetime GRMHD component of PANGU. Built on Parthenon, the solver combines finite-volume Godunov methods and constrained transport on uniform and block-structured statically refined meshes. A flexible geometry interface supports multiple coordinate representations of prescribed stationary spacetimes, while the modular architecture enables additional physical and numerical components to be incorporated without restructuring the core solver. The current implementation covers Newtonian, special-relativistic, and general-relativistic hydrodynamics and magnetohydrodynamics. We validate the solver through analytic benchmarks and convergence studies, matched cross-code comparisons, multidimensional magnetized-flow problems, and relativistic accretion simulations. The results establish the accuracy and robustness of PANGU on uniform and statically refined meshes and provide the fixed-spacetime GRMHD foundation for the broader PANGU framework. Numerical-relativity and coupled dynamical-spacetime GRMHD capabilities will be presented in subsequent work.