Document Detail


Interplay between geometry and flow distribution in an airway tree.
MedLine Citation:
PMID:  12731949     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Uniform flow distribution in a symmetric volume can be realized through a symmetric branched tree. It is shown here, however, by 3D numerical simulation of the Navier-Stokes equations, that the flow partitioning can be highly sensitive to deviations from exact symmetry if inertial effects are present. The flow asymmetry is quantified and found to depend on the Reynolds number. Moreover, for a given Reynolds number, we show that the flow distribution depends on the aspect ratio of the branching elements as well as their angular arrangement. Our results indicate that physiological variability should be severely restricted in order to ensure adequate fluid distribution through a tree.
Authors:
B Mauroy; M Filoche; J S Andrade; B Sapoval
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2003-04-08
Journal Detail:
Title:  Physical review letters     Volume:  90     ISSN:  0031-9007     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2003 Apr 
Date Detail:
Created Date:  2003-05-06     Completed Date:  2003-06-12     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  148101     Citation Subset:  IM    
Affiliation:
Centre de Mathématiques et de leurs Applications, CNRS, Ecole Normale Supérieure de Cachan, 94235 Cachan, France.
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MeSH Terms
Descriptor/Qualifier:
Animals
Bronchi / anatomy & histology*,  physiology*
Humans
Lung / anatomy & histology,  physiology
Models, Anatomic*
Models, Biological*
Respiratory Mechanics
Comments/Corrections
Comment In:
Phys Rev Lett. 2004 Jul 23;93(4):049801; author reply 049802   [PMID:  15323804 ]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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