Moving Mesh FE/BE Hybrid Simulation of Electromagnetic Field Evolution for Railgun

Numerical simulation of a railgun always requires a huge number of mesh points in order to depict the entire rail and armature, due to its large rail length. Under such conditions, the traditional A-Φ method usually becomes very time-consuming in solving the electromagnetic field evolution. In this paper, a moving mesh finite-element/boundary-element hybrid scheme is proposed, utilizing the shift invariant properties of the field distribution along the rail. The electric and magnetic fields are directly solved in the conductor domain. Simulation results demonstrate the good performance of this scheme.