20301 嚥下のモデリングとシミュレーション(人工臓器と医用工学(1),OS.8 人工臓器と医用工学)

概要

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The influence of liquid food viscosity on the swallow was investigated using a finite element simulation. A linear elastic model was applied to a tongue, a pharynx, an esophagus, an epiglottis, a larynx, and a trachea. A Newtonian fluid model was assumed for the liquid bolus. The elastic materials were divided into Lagragian mesh elements. The domain of the bolus flow was divided into Eulerian mesh elements, and the bolus flow was simulated with an ALE method. The lift-up of the larynx and the retroflexion of the epiglottis were implemented in the swallowing movements. The normal swallowing of water was simulated, and the reasonable results were obtained, The penetration of the bolus to the trachea was inhibited by the retroflexion of the epiglottis, and the bolus was split into the side flow channels around the larynx as observed in the typical X-ray videofluorography of barium.
社団法人日本機械学会の論文
2009-03-05