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The research aims to simulate and model the behavior of vibrating fuel assemblies in axial flow using finite element and CFD methods.

Simulation and modelling of a vibrating rod bundle: Finite elements model results and CFD-based prediction of added coefficients

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The research aims to simulate and model the behavior of vibrating fuel assemblies in axial flow using finite element and CFD methods.
Conducted simulations of the ALAIN experiment, a model representing pressurized water reactor fuel assemblies.
Analyzed dry vibration modes of the assembly against theoretical predictions.
Performed RANS simulations to study turbulent flow interactions with the vibrating rod bundle.
Vibration modes closely match theoretical predictions for an Euler-Bernoulli beam.
Vibration frequencies are reduced due to grid-spring-dimple systems.
Fluid-added modal coefficients were successfully computed from numerical simulations.

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Randomized trial investigates vibration effects in rod bundles under axial flow, suggesting computational methods for enhanced predictions.

Michel et al. (2026) studied this question.

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Randomized trial investigates vibration effects in rod bundles under axial flow, suggesting computational methods for enhanced predictions.