Efficient and Quasi-realistic Magnetohydrodynamic Modeling of Coronal Mass Ejection Propagation and Evolution

Coronal mass ejections (CME) are one of the main drivers of space weather. However, quasi-realistic and efficient numerical modelling of the CME propagation and evolution process in the whole solar-terrestrial space, especially in the sub-Alfvénic corona, is still lacking. Recently, we have made some attempts to improve our ability to model CMEs. 1. We developed an efficient and quasi-realistic time-evolving MHD coronal model which can be used to provide inner-boundary conditions for the inner heliosphere models in practical space weather forecasting.  2. We developed an efficient and time-accurate MHD model of the solar corona and CME to timely and accurately simulate time-varying events in solar corona with low plasma β. 3. We developed an extended magnetic field decomposition strategy to improve the numerical stability of the time-evolving MHD coronal models in solving low-β issues. 4. We are conducting some faster-than-real-time CME simulations from the solar surface to 1 AU based on the work mentioned above. In this work, the solar-terrestrial space is covered by extending the coronal model to 1 AU or by coupling the coronal model with an inner heliosphere model. These MHD models are demonstrated to be very efficient and numerically stable and are promising to timely and accurately simulate time-varying events in solar-terrestrial space for practical space weather forecasting. I'd like to share our research work at EGU conference and call for more collaborations to perform more interesting research works.