Plasma and Fusion Research

Volume 17, 2401089 (2022)

Regular Articles

Performance Improvement of Symmetric Linear System Solver in Shielding Current Analysis of HTS Thin Film: Application of H-Matrix-Based Preconditioner
Yamagata University, Yonezawa, Yamagata 992-8510, Japan
(Received 10 January 2022 / Accepted 20 May 2022 / Published 8 July 2022)


The conjugate gradient (CG) method with the acceleration technique of using both H-matrix arithmetic and H-matrix-based preconditioning is applied to the linear system that appeared in the shielding current analysis of the uncracked high-temperature superconducting film and its performance is investigated numerically. The computational results show that the proposed acceleration technique is extremely effective for improving the speed of the CG method.


finite element method, Newton method, conjugate gradient method, preconditioning, H-matrix method, superconducting film

DOI: 10.1585/pfr.17.2401089


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