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International Conference on Mechanical and Electrical Technology, 3rd, (ICMET-China 2011), Volumes 1–3

Yi Xie
Yi Xie
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The airflow movement in human mouth-throat model is investigated using the method of CFD. The airflow patterns in human mouth-throat model and effect of airflow movement on the shear stress acting on the wall of the mouth-throat model and the aerosols deposition are discussed. During the inhalation phase, the airflow separates gradually near the outer wall of the pharynx and near the outer wall for the upper part of the trachea downstream of the glottis with the features of the separation zone appearing. During the exhalation phase, the high velocity zone is observed near the outer wall of pharynx and near the outer wall of the larynx. During the cyclic respiratory pattern, the high axial velocity zone and secondary flow are generated intermittently, eventually leading to generate the high shear stress zone intermittently.

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