Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 08, 2024 - September 11, 2024
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 oscillatory flow. Measurement areas were around the first branch of the bronchial model. Velocity distribution is measured by PIV. The measurement results were phase averaged in synchronization with the oscillatory flow. Above the first branch in the inspiratory phase, the peak of velocity was observed near the center of the channel. The area of slow speed stream was observed on the left side of the channel. In the right bronchus underside of the first branch, the peak of velocity was observed on the left side of the channel. This is because the high speed stream observed above the first branch flows into the left side of channel. In the left bronchus underside of the first branch, the peak of velocity was not observed as pronounced as velocity distribution in the right bronchus. This is because the slow speed stream observed above the first branch flows into the channel. Above the first branch in the expiratory phase, the peak of velocity was not observed as pronounced as the velocity distribution in the inspiratory phase. This is presumably because the flow from the right bronchus and the flow from the left bronchus, which have the almost the same velocity, flow into the channel separately. In the right bronchus underside of the first branch, the peak of velocity was observed on the left side of the channel. In the left bronchus underside of the first branch, the peak of velocity was not observed as pronounced as the velocity distribution in the right bronchus.
