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Numerical modelling of melt behaviour in the lower vessel head of a nuclear reactor

Pavlidis, D., Gomes, J. L. M. A., Xie, Zhihua, Pain, C. C., Tehrani, A. A. K., Moatamedi, M., Smith, P. N., Jones, A. V. and Matar, O. K. 2015. Numerical modelling of melt behaviour in the lower vessel head of a nuclear reactor. Procedia IUTAM 15 , pp. 72-77. 10.1016/j.piutam.2015.04.011

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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.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Uncontrolled Keywords: Heat transfer; Melt pool; Phase-change; Solidification
Publisher: Elsevier
ISSN: 2210-9838
Funders: Engineering and Physical Sciences Research Council (EPSRC)
Date of First Compliant Deposit: 24 January 2017
Last Modified: 04 Jun 2017 09:37
URI: http://orca.cf.ac.uk/id/eprint/97692

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