ABSTRACT

Deviant geometry of nasal channels results in significant changes to nasal aerodynamics that alter flow resistance, sensation, and the ability to filter aerosols. The invasive, operative modification of nasal geometry might alter the intranasal flow patterns, and this must be considered in advance at the stage of surgical planning. The present work describes flow patterns, reproduced numerically for several nasal geometries. This includes the reference channel geometry without physiological modifications. Making use of the commercial CFD-package STAR-CCM+, we document a down to 51% reduction and up to a 280% increase in nasal flow resistance for enlarged and obstructed channel geometries. The study on particle deposition revealed an only 18% deposition efficiency for the enlarged nasal cavities, while this parameter was up to 58% for the normal and obstructed geometries.

摘要

鼻腔通道的几何形状不正确会导致鼻腔空气动力学发生显着变化，从而改变流动阻力，感觉和气溶胶过滤能力。鼻腔几何形状的侵入性，手术修改可能会改变鼻腔内血流模式，因此必须在手术计划阶段预先考虑。目前的工作描述了流动模式，数字地复制了几种鼻部几何形状。这包括没有生理改变的参考通道几何形状。利用商用CFD组件STAR-CCM +，我们发现对于扩大和受阻的通道几何形状，鼻流阻力降低了51％，而流向阻力却提高了280％。颗粒沉积的研究表明，鼻腔增大时沉积效率仅为18％，