A New High-Order Magnetohydrodynamic Code for Space Weather Modeling

Abstract

A New High-Order Magnetohydrodynamic Code for Space Weather Modeling

Dongsu Ryu (UNIST)

Space weather, a branch of space physics, investigates the dynamic conditions within the Solar System and its heliosphere. This field relies on both observations and modeling, with simulations playing a crucial role in understanding space weather phenomena. Globally, various modeling frameworks have been developed, typically incorporating magnetohydrodynamic (MHD), particle-in-cell (PIC), and hybrid codes. In this talk, I will introduce a new high-order MHD code that has the potential to serve as the foundation for a future Korean space weather modeling framework. The code employs a high-order finite-difference weighted essentially non-oscillatory (WENO) scheme for spatial discretization and a high-order strong stability-preserving Runge-Kutta (SSPRK) method for time integration. Additionally, to maintain consistency with the WENO scheme's high-order accuracy, we have developed and implemented a novel constrained transport (CT) algorithm that enforces div(B)=0 condition with a high-order accuracy. The accuracy and robustness of the code are demonstrated through tests involving wave propagation and complex flow dynamics.