3D simulations of vertical displacement events in tokamaks: A benchmark of M3D-C ¹ , NIMROD, and JOREK

In recent years, the nonlinear 3D magnetohydrodynamic codes JOREK, M3D-C$^1$ and NIMROD developed capability of modelling realistic vertical displacement events (VDEs) including resistive walls. this paper, a comprehensive VDE benchmark is presented between these state art codes. The simulated case based on an experimental NSTX plasma but with simplified rectangular wall. spite pronounced differences physics models numerical methods, comparison shows very good agreement in relevant quantities used to characterize disruptions such as wall forces energy decay. This does not only bring confidence regarding use mentioned for disruption studies, also respect (e.g. reduced versus full MHD models). simulations show important features self-consistent evolution halo current origin forces. contrast other ordering aspect ratio, ansatz JOREK model allows capturing dynamics even spherical tokamak limit considered here.