Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
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Moving Mesh Application for Thermal-Hydraulic Analysis in Cable-In-Conduit-Conductors of KSTAR Superconducting Magnet

  • Yoon, Cheon-Seog (Department of Mechanical Engineering, Hannam University) ;
  • Qiuliang Wang (Samsung Advanced Institute of Technology) ;
  • Kim, Keeman (Samsung Advanced Institute of Technology) ;
  • Jinliang He (Department of Electrical Engineering, Tsinghua University)
  • Published : 2002.04.01
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Abstract

In order to study the thermal-hydraulic behavior of the cable-in-conduit-conductor (CICC), a numerical model has been developed. In the model, the high heat transfer approximation between superconducting strands and supercritical helium is adopted. The strong coupling of heat transfer at the front of normal zone generates a contact discontinuity in temperature and density. In order to obtain the converged numerical solutions, a moving mesh method is used to capture the contact discontinuity in the short front region of the normal zone. The coupled equation is solved using the finite element method with the artificial viscosity term. Details of the numerical implementation are discussed and the validation of the code is performed for comparison of the results with thse of GANDALF and QSAIT.

Keywords

References

  1. Anderson, D. A., Tannehill, J. C. and Pletcher, R. H., 1984, Computational Fluid Mechanics and Heat Transfer, Hemispere Publishing Corporation
  2. Blom, J. G. and Zegeling, P. A., 1994, 'Algorithm 731 : A Moving Grid Interface for Systems of One Dimensional Time Dependent Partial Differential Equations,' ACM Transactions on Mathematical Software, Vol. 20, pp. 194-214 https://doi.org/10.1145/178365.178391
  3. Bottura, L., EUR-FU XII/185/93
  4. Bottura, L., 1995, 'Numerical Aspects in the Simulation of Thermo-Hydraulic Transients in CICC's,' Journal of Fusion Energy, Vol. 14, pp. 13-24 https://doi.org/10.1007/BF02214030
  5. Bottura, L., 1996, 'A Numerical Model for the Simulation of Quench in the ITER Magnets,' Journal of Computational Physics, Vol. 125, pp. 26-41 https://doi.org/10.1006/jcph.1996.0077
  6. Bottura, L. and Zienkiewicz, O. C., 1991, 'Quench Analysis of Large Superconducting,' Crygenics, Vol. 32, pp. 719-728 https://doi.org/10.1016/0011-2275(92)90283-G
  7. Huang, W., Ren, Y. and Russell, R. D., 1994, 'Moving Mesh Partial Differntial Equations(MMPDs) Based on the Equidistribution Principle,' SIAM Journal of Numerical Analysis, Vol. 31, pp. 709-730 https://doi.org/10.1137/0731038
  8. Koizumi, N., Takahashi, Y. and Tsuji, H., 1996, 'Numerical Model Using an Implicit Finite Difference Algorithm for the Stability Simulation of a Cable-In-Conduit Conductor,' Cryogenics. Vol. 36, pp. 649-659 https://doi.org/10.1016/0011-2275(96)00065-3
  9. Luougo, C. A., Loyd, R. J., Chen, F. K. and Peck, S. D., 1998, 'Thermal Hydraulic Simulation of Helium Expulsion from a Cable-In-Conduit Conductor,' IEEE Transactions on Magnetics, Vol. 25, pp. 1589-1595 https://doi.org/10.1109/20.92602
  10. Marinucci, C., Bottura, L., Vecsey, G. and Zanino, R., 1998, 'The QUELL Experiment as a Validation Tool for the Numerical Code Gandalf,' Cryogenics, Vol. 38, pp. 467-477 https://doi.org/10.1016/S0011-2275(98)00014-9
  11. Schultz, J. H., 1997, 'KSTAR Superconducting Magnets system,' KSTAR Design Point Definition Workshop, Princeton Plasma Physics Laboratory, USA, pp. 205-243
  12. Shaji, A. and Freiderg, J. P., 1994, 'Quench in Superconducting Magnets: I. Model and Numerical Implementation,' Journal of Applied Physics, Vol. 76, pp. 3149-3158 https://doi.org/10.1063/1.357498
  13. Shaji, A. and Freidberg, J. P., 1996, 'Theory of Hybrid Contact Discontinuities,' Physical Review Letter, Vol. 76, pp. 2710-2713 https://doi.org/10.1103/PhysRevLett.76.2710
  14. Wang, Q., Oh, S., Ryu, K., Yoon, C. and Kim, K., 1999, 'Numerical Analysis on Stability Margin and Quench Behavior in Cable-In-Conduit NbTi Conductor,' IEEE Transactions on Applied Superconductivity, Vol. 9, pp. 620-624 https://doi.org/10.1109/77.783372
  15. Wang, Q., Yoon, C. S. and Kim, K., 2000, 'Numerical Model for the Thermal-Hydraulic Analysis in the Cable-In-Conduit Conductor,' KSME International Journal, Vol. 14, No. 9, pp. 985-996
  16. Wang, Q., He, J., Yoon, C. S., Chung, W. and Kim, K., 2002, 'Simulation on Helium Expansion and Quench in CICC for KSTAR with Moving Mesh Methods,' IEEE Transactions on Applied Superconductivity, March https://doi.org/10.1109/TASC.2002.1018708