Numerical analysis of stochastic dispersion of micro-particles in turbulent flows in a realistic model of human nasal/upper airway

被引：65

作者：

Ghahramani, Ebrahim ^{[1
]}

Abouali, Omid ^{[1
]}

Emdad, Homayoon ^{[1
]}

Ahmadi, Goodarz ^{[2
]}

机构：

[1] Shiraz Univ, Sch Mech Engn, Shiraz, Iran

[2] Clarkson Univ, Dept Aeronaut & Mech Engn, Potsdam, NY 13676 USA

来源：

JOURNAL OF AEROSOL SCIENCE | 2014年 / 67卷

关键词：

Human upper airway; Micro-particle deposition; CRW; Realistic model; Biofluid mechanics; PARTICLE DEPOSITION; AEROSOL DEPOSITION; NANOPARTICLE DEPOSITION; COMPUTER-SIMULATION; RANDOM-WALK; FLUID-FLOW; MOUTH; MICRO; PREDICTION; TRANSPORT;

D O I：

10.1016/j.jaerosci.2013.09.004

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Turbulent flow field and particle deposition in a realistic model of human upper airway system including: nasal cavity, nasopharynx, oropharynx, larynx and trachea were analyzed numerically. The Lagrangian approach was used to find the trajectories of micron-size particles for the breathing rates of 30, 45 and 60 1/min. The continuous phase flow was evaluated using a RANS (Reynolds Average Navier-Stokes) turbulence model and the effect of turbulent fluctuations on particle trajectories was modeled using a continuous random walk (CRW) stochastic model, which is based on the normalized Langevin equation. The total and regional deposition fractions of micro-particles were evaluated and the effect of turbulent fluctuations on the particle deposition rate was investigated. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：188 / 206

页数：19

共 57 条

[1] Micro and nanoparticle deposition in human nasal passage pre and post virtual maxillary sinus endoscopic surgery [J].