Numerical Modelling of Melt Behaviour in the Lower Vessel Head of a Nuclear Reactor

Dimitrios Pavlidis, Jefferson Luis Melo De Almeida Gomes, Zhihua Xie, Christopher C. Pain, Ali Tehrani, Moji Moatamedi, Paul Smith, Allan Jones, Omar Matar

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Abstract

This paper describes progress on a consistent approach for multi-phase flow modelling with phase-change. Although, the developed methods are general purpose the applications presented here cover the LIVE experiments involving core melt phenomena at the lower vessel head of a nuclear reactor. These include corium pool formation, coolability and solidification. A new method for solving the compositional multi-phase flow equations to calculate material indicator fields is adopted. An interface-capturing scheme based on high-order accurate compressive advection methods including a Petrov-Galerkin approach is employed to maintain sharpness of the interfaces between materials. A novel control volume-finite element mixed formulation based on the P1DG-P2 (linear discontinuous in velocity and quadratic continuous in pressure) element pair which can uniquely ensure that key balances are maintained in the equations is developed to discretise the governing equations in space. Anisotropic mesh adaptivity is used to focus the numerical resolution around the interfaces and other areas of important dynamics.
Original languageEnglish
Pages (from-to)72-77
Number of pages6
JournalProcedia IUTAM
Volume15
Early online date28 May 2015
DOIs
Publication statusPublished - 2015

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Multiphase flow
Nuclear reactors
Advection
Solidification
Experiments

Keywords

  • Heat transfer
  • solidification
  • melt pool
  • phase-change

Cite this

Numerical Modelling of Melt Behaviour in the Lower Vessel Head of a Nuclear Reactor. / Pavlidis, Dimitrios; Gomes, Jefferson Luis Melo De Almeida; Xie, Zhihua; Pain, Christopher C.; Tehrani, Ali; Moatamedi, Moji; Smith, Paul; Jones, Allan; Matar, Omar.

In: Procedia IUTAM, Vol. 15, 2015, p. 72-77.

Research output: Contribution to journalArticle

Pavlidis, D, Gomes, JLMDA, Xie, Z, Pain, CC, Tehrani, A, Moatamedi, M, Smith, P, Jones, A & Matar, O 2015, 'Numerical Modelling of Melt Behaviour in the Lower Vessel Head of a Nuclear Reactor', Procedia IUTAM, vol. 15, pp. 72-77. https://doi.org/10.1016/j.piutam.2015.04.011
Pavlidis, Dimitrios ; Gomes, Jefferson Luis Melo De Almeida ; Xie, Zhihua ; Pain, Christopher C. ; Tehrani, Ali ; Moatamedi, Moji ; Smith, Paul ; Jones, Allan ; Matar, Omar. / Numerical Modelling of Melt Behaviour in the Lower Vessel Head of a Nuclear Reactor. In: Procedia IUTAM. 2015 ; Vol. 15. pp. 72-77.
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abstract = "This paper describes progress on a consistent approach for multi-phase flow modelling with phase-change. Although, the developed methods are general purpose the applications presented here cover the LIVE experiments involving core melt phenomena at the lower vessel head of a nuclear reactor. These include corium pool formation, coolability and solidification. A new method for solving the compositional multi-phase flow equations to calculate material indicator fields is adopted. An interface-capturing scheme based on high-order accurate compressive advection methods including a Petrov-Galerkin approach is employed to maintain sharpness of the interfaces between materials. A novel control volume-finite element mixed formulation based on the P1DG-P2 (linear discontinuous in velocity and quadratic continuous in pressure) element pair which can uniquely ensure that key balances are maintained in the equations is developed to discretise the governing equations in space. Anisotropic mesh adaptivity is used to focus the numerical resolution around the interfaces and other areas of important dynamics.",
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AB - This paper describes progress on a consistent approach for multi-phase flow modelling with phase-change. Although, the developed methods are general purpose the applications presented here cover the LIVE experiments involving core melt phenomena at the lower vessel head of a nuclear reactor. These include corium pool formation, coolability and solidification. A new method for solving the compositional multi-phase flow equations to calculate material indicator fields is adopted. An interface-capturing scheme based on high-order accurate compressive advection methods including a Petrov-Galerkin approach is employed to maintain sharpness of the interfaces between materials. A novel control volume-finite element mixed formulation based on the P1DG-P2 (linear discontinuous in velocity and quadratic continuous in pressure) element pair which can uniquely ensure that key balances are maintained in the equations is developed to discretise the governing equations in space. Anisotropic mesh adaptivity is used to focus the numerical resolution around the interfaces and other areas of important dynamics.

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