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| Numerical simulation for airflow movement in the human upper respiratory tract |
| Received:September 04, 2008 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20105023 |
| KeyWord:upper respiratory tract air movement wall shearing stress numerical simulation particle image velocimetry |
| Author | Institution |
| 徐新喜 |
军事医学科学院 卫生装备研究所 国家生物防护工程技术研究中心,天津 |
| 赵秀国 |
军事医学科学院 卫生装备研究所 国家生物防护工程技术研究中心,天津 |
| 谭树林 |
军事医学科学院 卫生装备研究所 国家生物防护工程技术研究中心,天津 |
| 刘亚军 |
军事医学科学院 卫生装备研究所 国家生物防护工程技术研究中心,天津 |
| 高振海 |
军事医学科学院 卫生装备研究所 国家生物防护工程技术研究中心,天津 |
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| Abstract: |
| The CFD (Computational Fluid Dynamic) technology was used to investigate the air movement within the human upper respiratory tract. The simulation results were validated by the experimental results based on the PIV (Particle Image Velocimetry) experiment. The results show that the phenomenon of airflow separation appears near the outer wall of the pharynx and the trachea. The high velocity zone is created near the inner wall of the trachea. The airflow splits at the divider and high velocity zone is generated near the inner wall of the trachea. The maximum velocity appears at the exterior of the boundary layer. The secondary swirls and axial velocity distribution result in the high shearing stress acting on the inner wall of the trachea and bifurcation, finally lead to injury on the inner wall. |