1019 肺気道分岐管群内における振動流に関する数値シミュレーション(GS-2,5 管内流・非定常流,研究発表講演)

概要

論文の詳細を見る
Understanding of the deposition patterns and efficiencies of the inhaled particles like airborne pollutants and medicinal aerosols is important for estimating the health risk of toxic ambient particles and for delivering drug aerosols to desired lung target areas. Deposition patterns and efficiencies of inhaled particles are strongly affected by airflow in the airways in which airflow rate is large. In this study, the oscillating flow is numerically analyzed with FIDAP in three dimensional triple bifurcating airway models for both in-plane and 90 degrees out-of-plane configurations at Re=1563 and Womersley number α=2.55. Results of this study show that there is a couple of vortexes during inspiratory flow at downstream of bifurcation areas and that there are two couples of vortexes during expiratory flow at downstream of merging areas. In addition, differences in flow rate between same generation tubes in the out-of-plane model are smaller than that in the in-plane model.
2005-03-18