In process of adaptive finite element method, error evaluation is one of the important schemes. In the previous paper, we have proposed the error evaluation method based on rotation of magnetic flux density. However, the method has a complicated process on interface between different materials. In this paper, we propose a new error evaluation method based on the rotation of the intensity of magnetic filed obtained from the results of finite element method with coarser mesh. The newly proposed method has no complicated process on the interface between the different materials. Then we applied the proposed error evaluation method to a 2-D magnetostatic field problem for its verification.
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