Servizio Comunitario di Informazione in materia di Ricerca e Sviluppo - CORDIS

Advanced 2D and 3D numerical models of high-Tc superconductors

Textured materials were developed. These models can be used in 2D numerical simulations of non-twisted multifilamentary conductors with various filament arrangements in applied transport current and/or magnetic field of different orientation. AC loss optimization for use of Bi-2223/Ag wires and tapes was achieved for various operating conditions.

A new 3D formulation was implemented in the software package Flux3D, and was used for a detailed study of the coupling effect between superconducting filaments via the resistive (Ag) matrix, induced by an externally applied varying magnetic field.

These new results go beyond the theoretical predictions, which are valid only for the particular case of fully penetrated infinite slab geometries. Investigated was the dependence of the inter-filamentary coupling on several physical and geometrical parameters.

The 3D formulation, coupled with circuit equations for simulating an external current source, was successfully tested on typical 3D geometries, such as a corner-shaped conductor and a mono-layer cable, composed of eight twisted wires.

The developed advanced numerical methods represent powerful state-of-the-art tools for modelling of high-Tc superconductors in 2D and 3D.

Reported by

Swiss Federal Institute of Technology – Lausanne (EPFL)
EPFL IN Ecublens
1015 Lausanne
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