睡眠時の呼吸を模擬した人体の気管支モデル内振動流の PIV 計測

抄録

The flow in the bronchial tube was experimentally investigated using a human bronchial tube model. Resin bronchus model that is made by 3D printer is provided for the experiment. Microbubbles were used as tracers to visualize the movement of particles. The areas to be photographed are the secondary flow in the curved pipe and around the first branch of the bronchial model. Velocity distribution is measured by PIV. Refractive index matching technique are applied to measure velocity in the bronchus model. In the velocity distribution of the secondary flow, a pair of vortex flows can be seen on either side of the inside of the curved pipe. In the velocity distribution before the first branch of the bronchial model, the peak of velocity is observed at the center of the channel during the inhalation process. In the right and left bronchi, the position of the peak is more medially biased due to this effect. In exhalation, the velocity distribution is less biased than in inhalation.