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Comparison of multimesh hp-FEM to interpolation and projection methods for spatial coupling of thermal and neutron diffusion calculations
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SYSNO ASEP 0363238 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Comparison of multimesh hp-FEM to interpolation and projection methods for spatial coupling of thermal and neutron diffusion calculations Author(s) Dubcová, Lenka (UT-L)
Šolín, Pavel (UT-L) RID
Hansen, G. (US)
Park, H. (US)Source Title Journal of Computational Physics. - : Elsevier - ISSN 0021-9991
Roč. 4, č. 230 (2011), s. 1182-1197Number of pages 16 s. Language eng - English Country US - United States Keywords reactormultiphysics simulation ; coupled diffusion ; multiphysics error Subject RIV JA - Electronics ; Optoelectronics, Electrical Engineering R&D Projects IAA100760702 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z20570509 - UE-C, UT-L (2005-2011) UT WOS 000286782300019 DOI 10.1016/j.jcp.2010.10.034 Annotation Multiphysics solution challenges are legion within the field of nuclear reactor design and analysis. One major issue concerns the coupling between heat and neutron flow (neutronics) within the reactor assembly. These phenomena are usually very tightly interdependent, as large amounts of heat are quickly produced with an increase in fission events within the fuel, which raises the temperature that affects the neutron cross section of the fuel. Furthermore, there typically is a large diversity of time and spatial scales between mathematical models of heat and neutronics. Indeed, the different spatial resolution requirements often lead to the use of very different meshes for the two phenomena. As the equations are coupled, one must take care in exchanging solution data between them, or significant error can be introduced into the coupled problem. We propose a novel approach to the discretization of the coupled problem on different meshes based on an adaptive multimesh higher-order finite element method (hp-FEM), and compare it to popular interpolation and projection method. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2012 Electronic address http://www.sciencedirect.com/science/article/pii/S0021999110005905
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