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  4. Evaluation of the Applicability of Phenomenological HTS Models for Numerical Analysis of Quenches in Coated Conductors: Simulations vs. Experiments
 
research article

Evaluation of the Applicability of Phenomenological HTS Models for Numerical Analysis of Quenches in Coated Conductors: Simulations vs. Experiments

Roy, Francois  
•
Dutoit, Bertrand  
•
Sirois, Frederic
2011
IEEE Transactions on Applied Superconductivity

The electrical resistivity of coated conductors is strongly related to the inter-dependent set of parameters (J, H, T), respectively current density, magnetic field and temperature. On the one hand, it is difficult to isolate the contribution of each of these parameters on the resistivity measured experimentally. On the other hand, numerical methods, which may allow this separation, require a good knowledge of the fundamental laws governing the superconducting transition which are, up to now, derived from curve fitting with experimental data. In this paper, we investigate the influence of phenomenological formulas on the outputs of a recently developed finite element model. The outputs are compared against experimental voltage curves, which have been obtained under pulsed transport currents between 80 and 160 A and external magnetic fluxes of 0 to 350 mT. The comparisons indicate that the numerical models may reproduce well the measurements, using the right set of phenomenological laws parameters. Nevertheless, the solution may still be inaccurate at low field values and high current amplitudes, where the curvature of the simulated E-J curves is more pronounced, indicating that further refinement is required in order to obtain models valid over a wider range of parameters.

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Type
research article
DOI
10.1109/TASC.2010.2086991
Web of Science ID

WOS:000291054200060

Author(s)
Roy, Francois  
Dutoit, Bertrand  
Sirois, Frederic
Date Issued

2011

Publisher

IEEE Institute of Electrical and Electronics Engineers

Published in
IEEE Transactions on Applied Superconductivity
Volume

21

Start page

1190

End page

1193

Subjects

Fault current limiters

•

finite element methods

•

high-temperature superconductors

•

T-C Superconductors

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
SUPRA  
Available on Infoscience
December 16, 2011
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/74025
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