Speaker
Francesco Grilli
(Karlsruhe Institute of Technology)
Description
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. However, the simulation of certain applications requires a fully 3-D model. In this paper we report on the development of a 3-D model based on the H-formulation. We describe in detail the implementation of Maxwell’s equations, the imposition of current constraints and we discuss the issues related to meshing 3-D volumes. The obtained results are compared with analytical expressions based on the critical state model, if available, or with the results obtained with 2-D representations of 3-D problems
Author
Francesco Grilli
(Karlsruhe Institute of Technology)
Co-authors
Frederic Sirois
(Ecole Polytechnique Montreal)
Roberto Brambilla
(RSE SpA)
Steeve Memiaghe
(Ecole Polytechnique Montreal)
