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Development of a three-dimensional finite-element model for high-temperature superconductors based on the H-formulation.

Author(s) : GRILLI F., BRAMBILLA R., SIROIS F., et al.

Type of article: Article

Summary

Finite-element models are a powerful and widely used tool for evaluating the ac losses of HTS tapes and wires as well as of assemblies such as cables and coils. The H-formulation, which uses the magnetic field components as state variables, has proved to be an efficient implementation to solve 2-D problems, involving infinitely long or axially-symmetric geometries; an excellent agreement with experimental data has been found in many cases. However, the simulation of certain applications requires a full 3-D model. In this paper we report on the development of a 3-D model based on the H-formulation. We describe the implementation of Maxwell equations, the imposition of current constraints and we discuss the issues related to meshing 3-D volumes. The model is validated by comparing the results with those obtained with 2-D models in cases that can be investigated in 2-D; then, it is used to simulate cases that can be handled only in 3-D.

Details

  • Original title: Development of a three-dimensional finite-element model for high-temperature superconductors based on the H-formulation.
  • Record ID : 30008462
  • Languages: English
  • Source: Cryogenics - vol. 53
  • Publication date: 2013/01
  • DOI: http://dx.doi.org/10.1016/j.cryogenics.2012.03.007

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