Evaluation of the influence of the viscous sublayer on the mechanical stability of fuel plates under axial flow conditions
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Nuclear Engineering and Design
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The current work aims to investigate the influence of the viscous sublayer on the mechanical stability of fuel
element plates under axial flow conditions by means of two-way Fluid Structure Interaction (FSI) numerical
simulations. The methodology adopted is that proposed by (Mantec´on, 2019; Mantec´on and Mattar Neto, 2018),
who observed a transition from linear to non-linear behavior between the maximum deflection of the plates in
their leading edge with the square of the velocity of the cooling fluid in the channel. The speed at which the
transition is identified is the critical speed (Vc). In order to verify the influence of the viscous effects, the CFD
domain was discretized from its viscous sublayer. As this approach greatly increases the computational cost,
where the characteristics of the flow allowed, symmetry boundary conditions were used. In addition to this
approach, it was decided to investigate the ability to solve the FSI problem in steady state. The obtained results
confirmed that the boundary layer modeling is sufficient to determine the critical velocity. Furthermore, they
also suggest that the steady-state approach and the application of symmetry boundary conditions, where
possible, can be used in the design of new fuel elements, supporting traditional methods.
Como referenciar
MOURA, A.J.S.; MATTAR NETO, M. Evaluation of the influence of the viscous sublayer on the mechanical stability of fuel plates under axial flow conditions. Nuclear Engineering and Design, v. 415, p. 1-12, 2023. DOI: 10.1016/j.nucengdes.2023.112616. Disponível em: http://repositorio.ipen.br/handle/123456789/34373. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.