Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/16029
Title: Numerical simulation of the fluid-structure interaction for two simple fuel assemblies
Authors: Liu, ZG
Liu, Y 
Lu, J
Issue Date: 2013
Publisher: Elsevier Science Sa
Source: Nuclear engineering and design, 2013, v. 258, p. 1-12 How to cite?
Journal: Nuclear Engineering and Design 
Abstract: The fluid-structure interaction (FSI) for two simple fuel assemblies is studied by numerical method to remedy the deficiencies of theoretical and experimental methods. All the rods are considered as cylinders, modeled by Euler-Bernoulli beams, and are free to vibrate in any transverse directions. The FSI is simulated by the explicit partitioned scheme, in which the flow and structure solvers exchange the data within one time step to implement their coupling for FSI. The flow solver is the commercial CFD software Fluent and the structure solver is in-house developed beam solver, which is integrated into Fluent by the user-defined functions. The effects of dimensionless flow velocity and the number of cylinders on the dynamics of the fuel assemblies are investigated in detail. For small dimensionless flow velocity, the strong vibration is damped into weak oscillation induced by turbulence. If the dimensionless flow velocity is large enough, the buckling instability occurs. Increasing the number of cylinders in the fuel assembly promotes the occurrence of buckling instability. These are consistent with the existing theoretical and experimental results.
URI: http://hdl.handle.net/10397/16029
ISSN: 0029-5493
DOI: 10.1016/j.nucengdes.2013.01.029
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