文章基本信息

标题：Numerical Simulation of Particles Deposition in a Human Upper Airway:
本地全文：下载
作者：Debo Li ; Qisheng Xu ; Yaming Liu 等
期刊名称：Advances in Mechanical Engineering
印刷版ISSN：1687-8140
电子版ISSN：1687-8140
出版年度：2014
卷号：6
页码：1-13
DOI：10.1155/2014/207938
语种：English
出版社：Sage Publications Ltd.
摘要：Based on the CT scanned images, a realistic geometric model from nasal cavity to upper six-generation bronchia is rebuilt. In order to effectively simulate the particle movement and deposition, LES model is used and the particles are tracked in the frame of Lagrange. Seven kinds of typical particles, including micron particles (1, 5, and 10 μm) and nanoparticles (1, 5, 20, and 100 nm), and three representative respiratory intensities are adopted as computational case, respectively. Deposition efficiency (DE), deposition concentration (DC), and capture efficiency (CE) are introduced. Furthermore, the locations of particle deposition are visualized. The results indicate that the injecting particles from different nasal inlet present “transposition effect.”The DE values of micron particles are much higher than nanoparticles. The particle diameter plays a weaker role in nanoparticle depositions than micron particles. The highest values of DE and DC both occur in nasal cavity, while the highest CE up to 99.5% occurs in bronchus region.