An immersed body method for coupled neutron transport and thermal hydraulic simulations of PWR assemblies

Jewer, S.; Buchan, Andrew G.; Pain, Christopher C.; Cacuci, D.G.

doi:10.1016/j.anucene.2013.12.018

Cited by 7 publications

(4 citation statements)

References 21 publications

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“…Its applications include urban pollution [12], offshore wind turbines [19,42], nuclear energy [2,24], coastal engineering [28], cardiac blood flow [38,49], and particulate flows [1,10,26,47]. Two types of approaches in the area of computational FSI have been developed to couple both the solid and fluid equations.…”

Section: Introductionmentioning

confidence: 99%

Modelling of fluid–structure interaction with multiphase viscous flows using an immersed-body method

Yang

Xiang

Fang

et al. 2016

Journal of Computational Physics

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Section: Introductionmentioning

confidence: 99%

Modelling of fluid–structure interaction with multiphase viscous flows using an immersed-body method

Yang

Xiang

Fang

et al. 2016

Journal of Computational Physics

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“…They are utilized extensively in the nuclear sector, where they are essential tools for design and analysis. For example, they can be applied to predict neutron population distributions, 1 radiation intensities, 2 and the flows of coolant and heat within reactor cores 3 . For complex problems, numerical models can require significant computational resources due to the scale of the problems and the high dimensionality of the equations involved.…”

Section: Introductionmentioning

confidence: 99%

“…For example, they can be applied to predict neutron population distributions, 1 radiation intensities, 2 and the flows of coolant and heat within reactor cores. 3 For complex problems, numerical models can require significant computational resources due to the scale of the problems and the high dimensionality of the equations involved. For example, reactor cores are constructed from many tens of thousands of fuel and control rods, so large spatial meshes are required to resolve their full domain.…”

Section: Introductionmentioning

confidence: 99%

An adaptive reduced order model for the angular discretization of the Boltzmann transport equation using independent basis sets over a partitioning of the space‐angle domain

Hughes

Buchan

2022

Numerical Meth Engineering

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This article presents a new reduced order model (ROM) for the angular discretization of the Boltzmann transport equation. The angular ROM is built over a partitioning of the space-angle phase-space, by generating independent, optimized angular basis function sets for each partition. The advantage is that each basis function set is optimized to represent the neutron flux distribution in a particular partition of space and angle, rather than being optimized for the entire domain. This serves to reduce the total number of basis functions required, and therefore the solve time. Two numerical examples are presented to demonstrate the efficacy of the methods-a dog-leg duct problem, involving particle streaming, and the Watanabe-Maynard problem, which includes significant particle scattering. In both cases, it is shown that the method reduces the angular flux error, for a given basis size or solve time, by around an order of magnitude in comparison to other, similar ROM methods. An adaptive version of the method is also presented, whereby the number of basis functions within each space-angle partition can vary independently. It is shown to potentially provide further significant reductions in error.

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“…The supermeshing method has also been used in the general field of computing diagnostics of functions across multiple meshes [29]. In reactor physics IBM methods have been applied to resolve neutron radiation field [20] and used in coupled neutron-thermal hydraulic calculations [30,31]. It may have the potential to be used for full sub-channel analysis, provided appropriate correlations (e.g.…”

Section: Introductionmentioning

confidence: 99%

A combined immersed body and adaptive mesh method for simulating neutron transport within complex structures

Buchan

Dargaville

Pain

2019

Annals of Nuclear Energy

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This article describes a new adaptive immersed body method for the efficient and accurate modelling of neutron transport within geometrically complex domains. It combines two techniques of immersed body projections and self-adaptive mesh refinement to form a unique method that can efficiently resolve problems that contain complex internal structures. The approach allows complete freedom of where mesh resolution is placed and the meshes, which do not need to conform to the problem structure, are optimised for resolving the physics of the problem.

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An immersed body method for coupled neutron transport and thermal hydraulic simulations of PWR assemblies

Cited by 7 publications

References 21 publications

Modelling of fluid–structure interaction with multiphase viscous flows using an immersed-body method

Modelling of fluid–structure interaction with multiphase viscous flows using an immersed-body method

An adaptive reduced order model for the angular discretization of the Boltzmann transport equation using independent basis sets over a partitioning of the space‐angle domain

A combined immersed body and adaptive mesh method for simulating neutron transport within complex structures

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