Document Detail

Interplay between geometry and flow distribution in an airway tree.
MedLine Citation:
PMID:  12731949     Owner:  NLM     Status:  MEDLINE    
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.
B Mauroy; M Filoche; J S Andrade; B Sapoval
Related Documents :
1445489 - Distribution of low density lipoprotein in the branch and non-branch regions of the aorta.
2759939 - Some features of oscillatory flow in a model bifurcation.
14556039 - Homogeneous batch cultures of aspergillus oryzae by elimination of wall growth in the v...
14712379 - Hemodynamic changes occurring during the progressive enlargement of abdominal aortic an...
8945659 - Geometric design improvements for femoral graft-artery junctions mitigating restenosis.
19792319 - Flow conductance of a single nanohole.
20867649 - Stability and dissipation of laminar vortex flow in superfluid 3he-b.
8498449 - Effect of rapid intravenous crystalloid infusion on uteroplacental blood flow and place...
23769019 - Possible biomarkers of early mortality in peritonitis-induced sepsis rats.
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    
Centre de Mathématiques et de leurs Applications, CNRS, Ecole Normale Supérieure de Cachan, 94235 Cachan, France.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Bronchi / anatomy & histology*,  physiology*
Lung / anatomy & histology,  physiology
Models, Anatomic*
Models, Biological*
Respiratory Mechanics
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

Previous Document:  Evaluation of holonomic quantum computation: adiabatic versus nonadiabatic.
Next Document:  Wave initiation through spatiotemporally controllable perturbations.