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This paper presents a flexible time-stepping scheme for the time-domain finite element method (TDFEM) based hybrid field-circuit solver that allows subsystems of different sampling rates to be coupled in time. Because of this flexibility, the proposed time-stepping scheme could significantly improve the computational efficiency of the existing TDFEM-based hybrid field-circuit solver especially when...
In this paper, the authors apply the tree-cotree splitting (TCS) algorithm to the TDFEM to alleviate the constraint on the time-step size and to improve the convergence of iterative solutions at each time step. Compared with the conventional TDFEM, application of the TCS algorithm maintains the accuracy of the TDFEM solution but significantly reduces the number of iterations per time step for a preconditioned...
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