Abstract
The purpose of the present paper is to study the characteristics of flow and gas exchange in the pulsating flow in the respiratory net work both by flow visualization and by numerical simulation.
The pulsating flow in a two-dimensional duct was visualized by the smoke-wire method, and its time-dependent velocity profile in the duct was measured with reasonable accuracy. The behavior of the pulsating flow around the duct intake was observed by the tobacco-smoke method and it was shown that the breathing air causes the streaming that brings about gas exchange.
The numerical results confirmed the experimental results and predicted the behavior of gas diffusion at the intake.
