Spatial and temporal variation of secondary flow during oscillatory flow in model human central airways

G. Tanaka, T. Ogata, Kotaro Oka, K. Tanishita

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Axial and secondary velocity profiles were measured in a model human central airway to clarify the oscillatory flow structure during high- frequency oscillation. We used a rigid model of human airways consisting of asymmetrical bifurcation up to third generation. Velocities in each branch of the bifurcations were measured by two-color laser-Doppler velocimeter. The secondary velocity magnitudes and the deflection of axial velocity were dependent not only on the branching angle and curvature ratio of each bifurcation, but also strongly depended on the shape of the path generated by the cascade of branches. Secondary flow velocities were higher in the left bronchus than in the right bronchus. This spatial variation of secondary flow was well correlated with differing gas transport rates between the left and right main bronchus.

Original languageEnglish
Pages (from-to)565-573
Number of pages9
JournalJournal of Biomechanical Engineering
Volume121
Issue number6
Publication statusPublished - 1999 Dec

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Secondary flow
Bronchi
Laser Doppler velocimeters
Lasers
Flow structure
Color
Gases
Flow velocity

ASJC Scopus subject areas

  • Biomedical Engineering
  • Biophysics

Cite this

Spatial and temporal variation of secondary flow during oscillatory flow in model human central airways. / Tanaka, G.; Ogata, T.; Oka, Kotaro; Tanishita, K.

In: Journal of Biomechanical Engineering, Vol. 121, No. 6, 12.1999, p. 565-573.

Research output: Contribution to journalArticle

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