Magnetodynamic H-phi Thin-Shell

This model was shared by Alexandre Arsenault, Paul Scherrer Institut (PSI), Switzerland

These models demonstrate how to implement in Comsol (version 5.6) the thin shell approach first introduced in [1]. By combining the magnetodynamic H-phi formulation [2], magnetic scalar potential cuts [3] and an extra dimension domain, we show that HTS tapes with high aspect ratios can be efficiently simulated by modelling them as lines in 2D. The physics along the thickness of the tapes is taken into account by solving an additionally coupled problem in the extra dimension feature. We used the scdeq module in Comsol in order to implement our own physics while having access to discontinuous boundary conditions to impose cuts and cracks (see [4] for a complete explanation of the implementation). Note that the equation view must be enabled in Comsol to see the modifications that we made under the hood.

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Reference

1. B. De Sousa Alves, V. Lahtinen, M. Laforest, and F. Sirois, ‘Thin-shell approach for modeling superconducting tapes in the H-φ finite-element formulation’, Supercond. Sci. Technol., vol. 35, no. 2, p. 024001, Feb. 2022, doi: 10.1088/1361-6668/ac3f9e

2. A. Arsenault, B. de S. Alves, G. Giard, and F. Sirois, ‘Magnetodynamic H–ϕ Formulation for Improving the Convergence and Speed of Numerical Simulations of Superconducting Materials’, IEEE Transactions on Applied Superconductivity, vol. 33, no. 7, pp. 1–6, Oct. 2023, doi: 10.1109/TASC.2023.3293449

3. A. Arsenault, B. de S. Alves and F. Sirois, "COMSOL Implementation of the H-ϕ-Formulation With Thin Cuts for Modeling Superconductors With Transport Currents," in IEEE Transactions on Applied Superconductivity, vol. 31, no. 6, pp. 1-9, Sept. 2021, Art no. 6900109, doi: 10.1109/TASC.2021.3097245
   
   
4. B. de S. Alves, A. Arsenault and F. Sirois, "2-D Thin-Shell Model Based on the H-ϕ-Formulation for Modeling HTS Tapes in COMSOL Multiphysics," in IEEE Transactions on Applied Superconductivity, vol. 34, no. 9, pp. 1-10, Dec. 2024, Art no. 7500910, doi: 10.1109/TASC.2024.3473850