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MODERATOR FLOW SIMULATION AROUND CALANDRIA TUBES OF CANDU-6 NUCLEAR REACTORS.
- Source :
- Engineering Applications of Computational Fluid Mechanics; 2014, Vol. 8 Issue 1, preceding p178-192, 16p
- Publication Year :
- 2014
-
Abstract
- CFD simulations of cross-flows along in-line and staggered tube bundles which emulate those encountered in the calandria of CANDU-6 reactors are presented. The knowledge of external wall temperature distributions around calandria tubes is a major concern during normal and off-normal operating conditions of CANDU reactors. Calculations are performed using the FLUENT software with several turbulence models using segregated and Coupled algorithms. It is observed that κ-based models are able to reproduce mean velocities in staggered bundles. In most cases, the Coupled algorithm yields convergence even if it requires a longer computational time. Based on this work, the standard κ-ε model is recommended to perform this kind of simulations. Improved κ-ε models do not lead to better results while the κ-ω model predicts very well the physics only around the first row but it is unable to predict the flow around tubes located far downstream in the bundle. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 19942060
- Volume :
- 8
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Engineering Applications of Computational Fluid Mechanics
- Publication Type :
- Academic Journal
- Accession number :
- 118727706
- Full Text :
- https://doi.org/10.1080/19942060.2014.11015506