Vortex evolution induced by jets in realistic human mouth throat model
- VernacularTitle:真实人体口喉模型内气流喷射诱导涡结构演化
- Author:
Dong SUN
1
;
Fu-sheng LI
2
;
Xiu-guo ZHAO
2
;
Shu-lin TAN
2
;
Xin-xi XU
2
Author Information
1. Institute of Military Transportation of the General Logistics
2. National Biological Protection Engineering Center, Institute of Medical Equipment, Academy of Military Medical Sciences
- Publication Type:Journal Article
- Keywords:
Realistic human mouth-throat model;
Vortex evolution;
Airflow jet;
Numerical simulation
- From:
Journal of Medical Biomechanics
2013;28(5):E509-E514
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the vortex structure and vortex evolution induced by jets in mouth-pharynx area, so as to deepen the understanding of jet motion characteristics and disease prevention in mouth-pharynx area. Methods CT scanning and 3D reconstruction were used to construct 3D model of realistic human mouth-throat model, and the method of large eddy numerical simulation was used to accurately simulate the process of vortex evolution in the model. ResultsIn the phase of inhalation, several vortex tubes were formed in mouth, and a turbulence jet appeared in the glottal region. In the phase of exhalation, the intense jet in the glottal region caused complex vortex structures in throat. Conclusions During inhalation, transition occurrs in the pharynx, and the “horseshoe vortexes” which are similar to the shape of horseshoe appeared on the anterior wall of the trachea. During exhalation, “arch vortex” are formed on the posterior wall of throat with the barrier of epiglottis.
