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논문 기본 정보

자료유형
학술저널
저자정보
Fabian Wiltschko (School of Nuclear Engineering, Shanghai Jiao Tong University) Wenhai Qu (School of Nuclear Engineering, Shanghai Jiao Tong University) Jinbiao Xiong (School of Nuclear Engineering, Shanghai Jiao Tong University)
저널정보
한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제53권 제11호
발행연도
2021.11
수록면
3,625 - 3,634 (10page)
DOI
https://doi.org/10.1016/j.net.2021.05.034

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초록· 키워드

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The crossflow is the key phenomenon in turbulent flow inside rod bundles. In order to establish confidence on application of computational fluid dynamics (CFD) to simulate the crossflow in rod bundles,three Reynolds-Averaged Navier Stokes (RANS) models i.e. the realizable k-ε model, the k-u SST modeland the Reynolds stress model (RSM), and the Large Eddy simulations (LES) with the Wall-Adapting LocalEddy-viscosity (WALE) model are validated based on the Particle Image Velocimetry (PIV) flow measurement experiment in a 5 5 rod bundle. In order to investigate effects of periodic boundary conditionin the gap, the numerical results obtained with four inner subchannels are compared with that obtainedwith the whole 5 5 rod bundle. The results show that periodic boundaries in the gaps produce strongerrors far downstream of the spacer grid, and therefore the full 5 5 rod bundle should be simulated. Furthermore, it can be concluded, that the realizable k-ε model can only provide reasonable results veryclose to the spacer grid, while the other investigated models are in good agreement with the experimental data in the whole downstream flow in the rod bundle. The LES approach shows superiority to theRANS models

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