Fractal-based analysis of the void microstructure of Bi2Sr2CaCu2Ox superconducting filaments and the caused anomalous thermal diffusion

In order to protect high-field superconducting magnets during a quench with rapidly rising hot spot temperatures, it is important to have a quantitative understanding of quench behaviors of superconducting wires at high magnetic fields. In this article, we developed a two-dimensional numerical model of quench initiation and propagation in Bi2Sr2CaCu2Ox/Ag/Ag alloy (Bi2212) multifilamentary composite round wires with the H-formulation and the heat conduction equation. The results show that the minimum quench energy (MQE) of Bi2212 round wires decreases with increasing magnetic field and closely relates to the current sharing temperature (Tcs). For a constant ratio of the transport current to the critical current (It/Ic), the normal zone propagation velocity (NZPV) decreases with increasing magnetic field. However, the declining trend of NZPVs slows down beyond 10 T. Moreover, for a constant transport current It, the Ic and Tcs decrease with the increasing magnetic field, which results in a simultaneous increase of NZPV with a decrease of MQE.

show abstract

Numerical simulation of quench initiation and propagation in multi-filamentary Bi2Sr2CaCu2Ox round wires at high magnetic fields

Jiang

Gou

Shen

2019

Journal of Applied Physics

View full text Add to dashboard Cite

show abstract

Interpretation of Compressive Strain Causing Critical Current Degradation of Bi2212 Round Wires

Wang

Jiang

Zhang

et al. 2022

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

An effective thermal conductivity and thermomechanical homogenization scheme for a multiscale Nb₃Sn filaments

Wang

Chen

Duan

et al. 2021

Nanotechnology Reviews

View full text Add to dashboard Cite

A comprehensive study of the multiscale homogenized thermal conductivities and thermomechanical properties is conducted towards the filament groups of European Advanced Superconductors (EAS) strand via the recently proposed Multiphysics Locally Exact Homogenization Theory (LEHT). The filament groups have a distinctive two-level hierarchical microstructure with a repeating pattern perpendicular to the axial direction of Nb3Sn filament. The Nb3Sn filaments are processed in a very high temperature between 600 and 700°C, while its operation temperature is extremely low, −269°C. Meanwhile, Nb3Sn may experience high heat flux due to low resistivity of Nb3Sn in the normal state. The intrinsic hierarchical microstructure of Nb3Sn filament groups and Multiphysics loading conditions make LEHT an ideal candidate to conduct the homogenized thermal conductivities and thermomechanical analysis. First, a comparison with a finite element analysis is conducted to validate effectiveness of Multiphysics LEHT and good agreement is obtained for the homogenized thermal conductivities and mechanical and thermal expansion properties. Then, the Multiphysics LEHT is applied to systematically investigate the effects of volume fraction and temperature on homogenized thermal conductivities and thermomechanical properties of Nb3Sn filaments at the microscale and mesoscale. Those homogenized properties provide a full picture for researchers or engineers to understand the Nb3Sn homogenized properties and will further facilitate the material design and application.

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

hi@scite.ai

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Fractal-based analysis of the void microstructure of Bi2Sr2CaCu2Ox superconducting filaments and the caused anomalous thermal diffusion

Cited by 3 publications

References 28 publications

Numerical simulation of quench initiation and propagation in multi-filamentary Bi2Sr2CaCu2Ox round wires at high magnetic fields

Numerical simulation of quench initiation and propagation in multi-filamentary Bi2Sr2CaCu2Ox round wires at high magnetic fields

Interpretation of Compressive Strain Causing Critical Current Degradation of Bi2212 Round Wires

An effective thermal conductivity and thermomechanical homogenization scheme for a multiscale Nb₃Sn filaments

Contact Info

Product

Resources

About

Fractal-based analysis of the void microstructure of Bi2Sr2CaCu2Ox superconducting filaments and the caused anomalous thermal diffusion

Cited by 3 publications

References 28 publications

Numerical simulation of quench initiation and propagation in multi-filamentary Bi2Sr2CaCu2Ox round wires at high magnetic fields

Numerical simulation of quench initiation and propagation in multi-filamentary Bi2Sr2CaCu2Ox round wires at high magnetic fields

Interpretation of Compressive Strain Causing Critical Current Degradation of Bi2212 Round Wires

An effective thermal conductivity and thermomechanical homogenization scheme for a multiscale Nb3Sn filaments

Contact Info

Product

Resources

About

An effective thermal conductivity and thermomechanical homogenization scheme for a multiscale Nb₃Sn filaments