2-D electro-thermal model for simulating non-uniform quench in 2G HTS coated conductors

The model calculates the time evolution of the electric potential and the temperature in a 2G HTS CC when a transport current is applied in presence of a low Jc region (defect) in the tape. The heat generated at the defect location creates a normal zone that propagates along the tape. The model can be used to determine the normal zone propagation velocity (NZPV) and the minimum quench energy for given geometric parameters of the tape. One important feature of the model is the possibility to adjust the interface resistance between the HTS layer and the stabilizer layer, which has an important impact on NZPV.

The figure below shows the temperature distribution of the HTS tape over time when a transport current close to the critical current is injected into the tape. The low Jc region induced a normal zone on the right end of the tape, which then propagates along its length.

This model was shared by C. Lacroix, Polytechnique Montréal, F. Sirois, Polytechnique Montréal and F. Grilli, Karlsruhe Institute of Technology.

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*with Joule Heating module

References

1. Lacroix et al. 2014 Supercond. Sci. Tech. 27 (3) 035003