NDLI: Simulation by Finite Difference Numerical Method of <formula formulatype=inline><tex Notation=TeX>${rm Nb}_{3}{rm Sn}$</tex> </formula> Strand Under Bending Strain

Content Provider	IEEE Xplore Digital Library
Author	Fiamozzi Zignani, C. Corato, V. della Corte, A. Di Zenobio, A. Messina, G. Muzzi, L.
Copyright Year	2002
Abstract	We report on the simulation of the current distribution in Nb₃Sn strand subjected to pure bending strain, obtained by resolving the implicit diffusion equations with finite difference algorithm in Mathworks environment. The critical current dependence on bending, temperature, and magnetic field is modeled by the Improved Deviatoric Scaling Law and is used in the power law electric field dependence across the superconductor. The strand is discretized in elements representing groups of twisted filaments embedded in the stabilization matrix and a distributed constant circuit model is applied for current transfer among filament bundles. The code is preliminarily validated by comparison with analytical solutions for different simplified situations, each one corresponding to a proper boundary condition. Transverse matrix resistivity and twist-pitch values are crucial elements for matching numerical results with experimentally measured critical currents.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	2641
Ending Page	2644
Page Count	4
File Size	439369
File Format	PDF
ISSN	10518223
Volume Number	19
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Finite difference methods Tin Magnetic field induced strain Critical current Current distribution Niobium Difference equations Temperature dependence Superconducting filaments and wires Circuits numerical simulation Bending strain critical current current distribution ${\rm Nb}_{3}{\rm Sn}$
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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