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URANS simulation of the turbulent flow in tight lattice bundle

URANS simulation of the turbulent flow in tight lattice bundle Abstract The flow structure in tight lattice is still of great interest to nuclear industry. An accurate prediction of flow parameter in subchannels of tight lattice is likable. Unsteady Reynolds averaged Navier Stokes (URANS) is a promising approach to achieve this goal. The implementation of URANS approach will be validated by comparing computational results with the experimental data of Krauss. In this paper, the turbulent flow with different Reynolds number (5000–215000) and different pitch-to-diameter(P/D) (1.005–1.2) are simulated with computational fluid dynamics (CFD) code CFX12. The effects of the Reynolds number and the bundle geometry (P/D) on wall shear stress, turbulent kinetic energy, turbulent mixing and large scale coherent structure in tight lattice are analyzed in details. It is hoped that the present work will contribute to the understanding of these important flow phenomena and facilitate the prediction and design of rod bundles. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png "Frontiers in Energy" Springer Journals

URANS simulation of the turbulent flow in tight lattice bundle

Yu, Yiqi; Yang, Yanhua
"Frontiers in Energy" , Volume 5 (4): 8 – Dec 1, 2011
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Publisher
Springer Journals
Copyright
2011 Higher Education Press and Springer-Verlag Berlin Heidelberg
ISSN
2095-1701
eISSN
1673-7504
DOI
10.1007/s11708-011-0165-7
Publisher site
See Article on Publisher Site

Abstract

Abstract The flow structure in tight lattice is still of great interest to nuclear industry. An accurate prediction of flow parameter in subchannels of tight lattice is likable. Unsteady Reynolds averaged Navier Stokes (URANS) is a promising approach to achieve this goal. The implementation of URANS approach will be validated by comparing computational results with the experimental data of Krauss. In this paper, the turbulent flow with different Reynolds number (5000–215000) and different pitch-to-diameter(P/D) (1.005–1.2) are simulated with computational fluid dynamics (CFD) code CFX12. The effects of the Reynolds number and the bundle geometry (P/D) on wall shear stress, turbulent kinetic energy, turbulent mixing and large scale coherent structure in tight lattice are analyzed in details. It is hoped that the present work will contribute to the understanding of these important flow phenomena and facilitate the prediction and design of rod bundles.

Journal

"Frontiers in Energy" – Springer Journals

Published: Dec 1, 2011

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