Title

Computational Model of Airflow in Upper 17 Generations of Human Respiratory Tract

Document Type

Article

Publication Date

2008

Publication Title

Journal of Biomechanics

Volume

41

Issue

9

First page number:

2047

Last page number:

2054

Abstract

Computational fluid dynamics (CFD) studies of airflow in a digital reference model of the 17-generation airway (bronchial tree) were accomplished using the FLUENT® computational code, based on the anatomical model by Schmidt et al. [2004. A digital reference model of the human bronchial tree. Computerized Medical Imaging and Graphics 28, 203–211]. The lung model consists of 6.744×106 unstructured tetrahedral computational cells. A steady-state airflow rate of 28.3 L/min was used to simulate the transient turbulent flow regime using a large eddy simulation (LES) turbulence model. This CFD mesh represents the anatomically realistic asymmetrical branching pattern of the larger airways. It is demonstrated that the nature of the secondary vortical flows, which develop in such asymmetric airways, varies with the specific anatomical characteristics of the branching conduits.

Keywords

Air flow; Airway (Medicine); Asymmetric bronchial tree; Bronchi; Computational fluid dynamics; Computer simulations; Human tracheobronchial airway model; LES model; Lungs; Tracheobronchial airways; Turbulence

Disciplines

Biomechanics and Biotransport | Biomedical Engineering and Bioengineering | Engineering | Fluid Dynamics

Language

English

Permissions

Use Find in Your Library, contact the author, or interlibrary loan to garner a copy of the item. Publisher policy does not allow archiving the final published version. If a post-print (author's peer-reviewed manuscript) is allowed and available, or publisher policy changes, the item will be deposited.

Identifier

DOI: http://dx.doi.org/10.1016/j.jbiomech.2007.12.019

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