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X-TREAM project: Task 1b - Survey of the state-of-the-art numerical techniques for solving coupled non-linear multi-physics equations

Manuel Calleja (Institutionen för teknisk fysik, Nukleär teknik)
Göteborg : Chalmers University of Technology, 2014. - 21 s.
[Rapport]

Nowadays, the precise modeling of a nuclear reactor core is a challenge. This task involves several aspects, from the computational power needed to perform simulations, to the physics and analysis of the outcome. The need to better understand the physical phenomena is critical in order to quantify and qualify nuclear safety parameters. Currently, substantial research has been done in order to optimize the prediction capabilities of coupled codes. The need to better understand the multi-physics coupling between the neutronics and the thermal-hydraulics is required. In this report, state-of-the art of current methods and numerical techniques used in coupled codes are highlighted. A better understanding of the numerical schemes will allows selecting an appropriate algorithm to be implemented in POLCA-T. POLCA-T is the coupled code developed by Westinghouse that currently uses an explicit approach to couple the neutronics (POLCA7) and thermal-hydraulics (RIGEL). The final objective is to implement the concept of the Jacobian-free Newton-Krylov method, which will be used for solving the nonlinear equations which rise from the coupled solution.

Nyckelord: coupled multi-physics, coupling numerical schemes, JFNK method, neutronic and thermal-hydraulic interactions



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Denna post skapades 2014-08-18. Senast ändrad 2014-08-22.
CPL Pubid: 201502

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Nukleär teknik (2006-2015)

Ämnesområden

Energi
Beräkningsfysik
Teknisk fysik

Chalmers infrastruktur

Ingår i serie

CTH-NT - Chalmers University of Technology, Nuclear Engineering 289