Modeling of Critical Currents by a Moving Front Method

Magnetic field and critical currents trapped in bulk superconductors are calculated by a moving front method. The fronts are predicted based on the solution of a series of static models. The critical currents are considered in both Bean and Kim approximations. The method has been implemented for the 2-D and 3-D test models. Good agreement in the prediction of trapped fields and magnetic moments of the superconducting rings and cylinders by the moving front and nonlinear conductivity methods has been achieved.