Multi-scale analysis on cavitation damage and its mitigation for the spallation neutron source

Kohei Okita, Kenji Ono, Takagi Shu, Yoichiro Matsumoto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Impact of injecting microbubbles on the thermal expansion due to the nuclear spallation reaction were examined numerically. Since the mercury density is higher than the density of solid wall, the interaction between mercury and solid wall must be taken into account. Our approach is to solve the momentum and energy conservation equations and the time development of elastic stress for both bubbly fluid and elastic solid. The Keller equation is employed to reproduce the nonlinear oscillation of bubble with considering the thermal dumping effect by the reduced order model. The continuum phase of liquid mercury is coupled with the discrete phase of microbubbles using the Euler-Lagrange method. As the results, the bubble cloud develops around the center of inertia of motion induced by the thermal expansion. The elasticity of the wall affects on the migration of the center of inertia away from the wall. The injection of microbubbles is effective to decrease the pressure rise due to thermal expansion for both rigid and elastic wall conditions when the void fraction of microbubbles is higher than the volume rate of thermal expansion of liquid mercury.

Original languageEnglish
Title of host publicationProceedings of the 4th International Conference on Computational Methods for Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2011
Pages600-610
Number of pages11
Publication statusPublished - Dec 1 2011
Event4th International Conference on Computational Methods for Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2011 - Kos, Greece
Duration: Jun 20 2011Jun 22 2011

Publication series

NameProceedings of the 4th International Conference on Computational Methods for Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2011

Other

Other4th International Conference on Computational Methods for Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2011
CountryGreece
CityKos
Period6/20/116/22/11

Fingerprint

Multiscale Analysis
Mercury
Thermal Expansion
Cavitation
Neutron sources
Neutron
Thermal expansion
Damage
Inertia
Bubble
Liquid
Void Fraction
Lagrange Method
Nonlinear Oscillations
Nuclear reactions
Reduced Order Model
Void fraction
Thermal Effects
Energy Conservation
Liquids

All Science Journal Classification (ASJC) codes

  • Applied Mathematics
  • Computational Mathematics

Cite this

Okita, K., Ono, K., Shu, T., & Matsumoto, Y. (2011). Multi-scale analysis on cavitation damage and its mitigation for the spallation neutron source. In Proceedings of the 4th International Conference on Computational Methods for Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2011 (pp. 600-610). (Proceedings of the 4th International Conference on Computational Methods for Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2011).

Multi-scale analysis on cavitation damage and its mitigation for the spallation neutron source. / Okita, Kohei; Ono, Kenji; Shu, Takagi; Matsumoto, Yoichiro.

Proceedings of the 4th International Conference on Computational Methods for Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2011. 2011. p. 600-610 (Proceedings of the 4th International Conference on Computational Methods for Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2011).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Okita, K, Ono, K, Shu, T & Matsumoto, Y 2011, Multi-scale analysis on cavitation damage and its mitigation for the spallation neutron source. in Proceedings of the 4th International Conference on Computational Methods for Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2011. Proceedings of the 4th International Conference on Computational Methods for Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2011, pp. 600-610, 4th International Conference on Computational Methods for Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2011, Kos, Greece, 6/20/11.
Okita K, Ono K, Shu T, Matsumoto Y. Multi-scale analysis on cavitation damage and its mitigation for the spallation neutron source. In Proceedings of the 4th International Conference on Computational Methods for Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2011. 2011. p. 600-610. (Proceedings of the 4th International Conference on Computational Methods for Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2011).
Okita, Kohei ; Ono, Kenji ; Shu, Takagi ; Matsumoto, Yoichiro. / Multi-scale analysis on cavitation damage and its mitigation for the spallation neutron source. Proceedings of the 4th International Conference on Computational Methods for Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2011. 2011. pp. 600-610 (Proceedings of the 4th International Conference on Computational Methods for Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2011).
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