Abstract
Vortical Structures in CT-based Breathing Lung Models
Bulletin of the American Physical Society, Vol.61(20), BAPS.2016.DFD.R16.3
Annual Meeting of the American Physical Society Division of Fluid Dynamics (APS DFD) (Portland, Oregon, 11/20/2016 - 11/22/2016)
2016
Abstract
The 1D-3D coupled computational fluid dynamics (CFD) lung model is applied to study vortical structures in the human airways during normal breathing cycles. During inhalation, small vortical structures form around the turbulent laryngeal jet and Taylor-G\H{o}rtler-like vortices form near the curved walls in the supraglottal region and at airway bifurcations. On exhalation elongated vortical tubes are formed in the left main bronchus, whereas a relatively slower stream is observed in the right main bronchus. These structures result in helical motions in the trachea, producing long lasting high wall shear stress on the wall. The current study elucidates that the correct employment of image-based airway deformation and lung deflation information is crucial for capturing the physiologically consistent regional airflow structures. The pathophysiological implications of these structures in destruction of tracheal wall will be discussed.
Details
- Title: Subtitle
- Vortical Structures in CT-based Breathing Lung Models
- Creators
- Jiwoong Choi - Seoul National UniversityChanghyun Lee - Seoul National UniversityEric A Hoffman - University of Iowa, RadiologyChing-Long Lin - University of Iowa, Mechanical Engineering
- Resource Type
- Abstract
- Publication Details
- Bulletin of the American Physical Society, Vol.61(20), BAPS.2016.DFD.R16.3
- Conference
- Annual Meeting of the American Physical Society Division of Fluid Dynamics (APS DFD) (Portland, Oregon, 11/20/2016 - 11/22/2016)
- Publisher
- American Physical Society
- ISSN
- 0003-0503
- Language
- English
- Date published
- 2016
- Academic Unit
- Radiology; Roy J. Carver Department of Biomedical Engineering; Internal Medicine; Mechanical Engineering
- Record Identifier
- 9984571658302771
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