A new analysis method for accurate supercurrent distribution inside HTS bulk

It is necessary to accurately comprehend the characteristics of high-temperature superconducting bulk in application. However, the accurate simulation of supercurrent in high-temperature superconducting bulk is difficult even by adopting the finite element method. The equivalent electrical conductivity of high-temperature superconducting bulk is introduced for the supercurrent analysis. Due to the strong non-linearity of the conductivity, the analytical convergence of the non-linear equation solvers, e.g., the Newton–Raphson method deteriorates. Consequently, the unreasonable supercurrent is observed in the results. Therefore, in this paper, the accuracy of the supercurrent analysis in the high-temperature superconducting bulk is discussed and a new method is proposed for the accurate high-temperature superconducting bulk simulation, and then the validity of the proposed method is discussed by analyzing two example models, a disk and a sphere.