Authors: Xianyu Liu (University of Michigan), Igor Sokolov (University of Michigan), Tamas Gombosi (University of Michigan)

The energy build-up and triggering processes of the coronal mass ejections (CMEs) are not fully understood. Advanced MHD simulations are needed to answer these processes and how to study them with observations. This work aims to simulate a CME triggered by flux cancellation based on the Titov-Demoulin model (TDm). The simulation is initiated with a steady background corona. We construct the flux rope by inserting a TDm into the model and then mimic the flux cancellation process with an evolving boundary condition. We study how the configuration evolved during the relaxation and triggering processes. We also focus on the synthesized observables and how they respond to the CME eruption.