Motions of an offset plate in Viscous channel flow: A model for flutter of the soft palate

Tetlow, G. A.; Lucey, Anthony D.

doi:10.1007/978-3-540-36841-0_874

Cited by 3 publications

(1 citation statement)

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“…Moreover, as numerical models require validation, it is much simpler to find in literature highquality experimental data sets to validate the numerical results [17]. Tetlow & Lucey [18] modelled the soft palate as a cantilevered flexible plate placed within a unsteady, viscous, incompressible channel flow to mimic the mechanical process for the dynamics of the soft palate in OSA. They revealed that constant inlet velocity conditions can over-estimate the energy exchange between the flow and the structure.…”

Section: Introductionmentioning

confidence: 99%

Time-Dependent Fluid-Structure Interaction Simulations of a Simplified Human Soft Palate

Li,

Laudato,

Mihaescu

2023

Bioengineering

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Obstructive Sleep Apnea Syndrome (OSAS) is a common sleep-related disorder. It is characterized by recurrent partial or total collapse of pharyngeal upper airway accompanied by induced vibrations of the soft tissues (e.g., soft palate). The knowledge of the tissue behavior subject to a particular airflow is relevant for realistic clinic applications. However, in-vivo measurements are usually impractical. The goal of the present study is to develop a 3D fluid-structure interaction model for the human uvulopalatal system relevant to OSA based on simplified geometries under physiological conditions. Numerical simulations are performed to assess the influence of the different breathing conditions on the vibrational dynamics of the flexible structure. Meanwhile, the fluid patterns are investigated for the coupled fluid-structure system as well. Increasing the respiratory flow rate is shown to induce larger structural deformation. Vortex shedding induced resonance is not observed due to the large discrepancy between the flow oscillatory frequency and the natural frequency of the structure. The large deformation for symmetric breathing case under intensive respiration is mainly because of the positive feedback from the pressure differences on the top and the bottom surfaces of the structure.

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Section: Introductionmentioning

confidence: 99%