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Title: User defined elements in ANSYS for 2D multiphysics modeling of superconducting magnets

Abstract

Dynamic simulation of superconducting magnets is critical for the design of quench protection systems to prevent potentially damaging temperatures and high voltage from developing after magnet quench. Modeling these scenarios is challenging due to the many multiscale phenomena which impact magnet behavior. These range from conductor scale effects of quench and interfilament coupling currents up to the behavior of the magnet in its powering and protection circuit. In addition, a strong coupling between electromagnetic and thermal domains is required to capture temperature and field dependent material properties and quench behavior. We present a finite element approach which integrates the various effects into the commercial software ANSYS by means of programming new element types. This is shown capable of simulating the strongly coupled transient electromagnetic, thermal, and circuit behavior of superconducting magnets required for quench protection studies. A benchmarking study is presented which shows close agreement between the new ANSYS elements and a COMSOL Multiphysics implementation developed at CERN for dump resistor and coupling loss induced quench based magnet protection of a Nb3Sn block dipole. Following this, the ANSYS implementation is shown reproducing strongly coupled quench back behavior observed during the test of a Nb3Sn superconducting undulator prototype at Lawrence Berkeleymore » National Laboratory.« less

Authors:
ORCiD logo [1];  [1];  [2];  [3];  [3]
+ Show Author Affiliations
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Paul Scherrer Inst. (PSI), Villigen (Switzerland); European Organization for Nuclear Research (CERN), Geneva (Switzerland)
  3. European Organization for Nuclear Research (CERN), Geneva (Switzerland)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
OSTI Identifier:
1581097
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Superconductor Science and Technology
Additional Journal Information:
Journal Volume: 32; Journal Issue: 9; Journal ID: ISSN 0953-2048
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; superconducting magnets; multiphysics modeling; fu nite element; quench protection; superconducting undulators

Citation Formats

Brouwer, Lucas, Arbelaez, Diego, Auchmann, Bernhard, Bortot, Lorenzo, and Stubberud, Edvard. User defined elements in ANSYS for 2D multiphysics modeling of superconducting magnets. United States: N. p., 2019. Web. doi:10.1088/1361-6668/ab2e63.
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Brouwer, Lucas, Arbelaez, Diego, Auchmann, Bernhard, Bortot, Lorenzo, & Stubberud, Edvard. User defined elements in ANSYS for 2D multiphysics modeling of superconducting magnets. United States. https://doi.org/10.1088/1361-6668/ab2e63
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Brouwer, Lucas, Arbelaez, Diego, Auchmann, Bernhard, Bortot, Lorenzo, and Stubberud, Edvard. Fri . "User defined elements in ANSYS for 2D multiphysics modeling of superconducting magnets". United States. https://doi.org/10.1088/1361-6668/ab2e63. https://www.osti.gov/servlets/purl/1581097.
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@article{osti_1581097,
title = {User defined elements in ANSYS for 2D multiphysics modeling of superconducting magnets},
author = {Brouwer, Lucas and Arbelaez, Diego and Auchmann, Bernhard and Bortot, Lorenzo and Stubberud, Edvard},
abstractNote = {Dynamic simulation of superconducting magnets is critical for the design of quench protection systems to prevent potentially damaging temperatures and high voltage from developing after magnet quench. Modeling these scenarios is challenging due to the many multiscale phenomena which impact magnet behavior. These range from conductor scale effects of quench and interfilament coupling currents up to the behavior of the magnet in its powering and protection circuit. In addition, a strong coupling between electromagnetic and thermal domains is required to capture temperature and field dependent material properties and quench behavior. We present a finite element approach which integrates the various effects into the commercial software ANSYS by means of programming new element types. This is shown capable of simulating the strongly coupled transient electromagnetic, thermal, and circuit behavior of superconducting magnets required for quench protection studies. A benchmarking study is presented which shows close agreement between the new ANSYS elements and a COMSOL Multiphysics implementation developed at CERN for dump resistor and coupling loss induced quench based magnet protection of a Nb3Sn block dipole. Following this, the ANSYS implementation is shown reproducing strongly coupled quench back behavior observed during the test of a Nb3Sn superconducting undulator prototype at Lawrence Berkeley National Laboratory.},
doi = {10.1088/1361-6668/ab2e63},
journal = {Superconductor Science and Technology},
number = 9,
volume = 32,
place = {United States},
year = {Fri Aug 02 00:00:00 EDT 2019},
month = {Fri Aug 02 00:00:00 EDT 2019}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1088/1361-6668/ab2e63
Copyright Statement
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Cited by: 6 works
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Figures / Tables:

Figure 1 Figure 1: An overview of coupled electromagnetic, circuit, and thermal simulation in ANSYS with user defined elements is shown. Such an approach allows for simulating the impact of interfilament coupling loss, quench, and structural eddy currents on magnet behavior while including temperature and field dependent material properties. The independently meshedmore » electromagnetic and thermal domains are coupled using the Multi-field Solver as described in section 3.« less
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Works referenced in this record:

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    Figures / Tables found in this record:

    Figure 1 (p. 4)figure
    Table 1 (p. 8)table
    Figure 2 (p. 9)figure
    Table 2 (p. 10)table
    Figure 3 (p. 11)figure
    Table 3 (p. 12)table
    Table 4 (p. 12)table
    Figure 4 (p. 13)figure
    Figure 5 (p. 14)figure
    Figure 6 (p. 14)figure
    Figure 7 (p. 15)figure
    Figure 8 (p. 15)figure
    Table 5 (p. 16)table
    Figure 9 (p. 17)figure
    Figure 10 (p. 18)figure
    Table 6 (p. 19)table
    Figure 11 (p. 20)figure
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