New method to evaluate the effective diffusivity in an oscillatory flow through a bifurcating airway model

Hideki Fujioka, Tomohiko Murakami, Kazuo Tanishita

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

A method based on Laplace transforms to evaluate mean effective diffusivity (Deff) in oscillatory flows with a complex geometry such as a bifurcation is proposed. Numerical simulation is performed to confirm the reliability of this method. The method is then used through a model of symmetrical bifurcation with branching angle of 70° and curvature ratios of δ = 1/8. The carbon dioxide concentration at two sections were measured with infrared absorption sensors. Deff does not show highly peaked characteristics because the secondary flow is not fully developed.

Original languageEnglish
Title of host publicationAmerican Society of Mechanical Engineers, Bioengineering Division (Publication) BED
EditorsM.C. Boyce
Place of PublicationNew York, NY, United States
PublisherASME
Pages211-212
Number of pages2
Volume31
Publication statusPublished - 1995
Externally publishedYes
EventProceedings of the 1995 ASME International Mechanical Congress and Exposition - San Francisco, CA, USA
Duration: 1995 Nov 121995 Nov 17

Other

OtherProceedings of the 1995 ASME International Mechanical Congress and Exposition
CitySan Francisco, CA, USA
Period95/11/1295/11/17

Fingerprint

Bifurcation (mathematics)
Secondary flow
Laplace transforms
Infrared absorption
Carbon dioxide
Geometry
Sensors
Computer simulation

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Fujioka, H., Murakami, T., & Tanishita, K. (1995). New method to evaluate the effective diffusivity in an oscillatory flow through a bifurcating airway model. In M. C. Boyce (Ed.), American Society of Mechanical Engineers, Bioengineering Division (Publication) BED (Vol. 31, pp. 211-212). New York, NY, United States: ASME.

New method to evaluate the effective diffusivity in an oscillatory flow through a bifurcating airway model. / Fujioka, Hideki; Murakami, Tomohiko; Tanishita, Kazuo.

American Society of Mechanical Engineers, Bioengineering Division (Publication) BED. ed. / M.C. Boyce. Vol. 31 New York, NY, United States : ASME, 1995. p. 211-212.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Fujioka, H, Murakami, T & Tanishita, K 1995, New method to evaluate the effective diffusivity in an oscillatory flow through a bifurcating airway model. in MC Boyce (ed.), American Society of Mechanical Engineers, Bioengineering Division (Publication) BED. vol. 31, ASME, New York, NY, United States, pp. 211-212, Proceedings of the 1995 ASME International Mechanical Congress and Exposition, San Francisco, CA, USA, 95/11/12.
Fujioka H, Murakami T, Tanishita K. New method to evaluate the effective diffusivity in an oscillatory flow through a bifurcating airway model. In Boyce MC, editor, American Society of Mechanical Engineers, Bioengineering Division (Publication) BED. Vol. 31. New York, NY, United States: ASME. 1995. p. 211-212
Fujioka, Hideki ; Murakami, Tomohiko ; Tanishita, Kazuo. / New method to evaluate the effective diffusivity in an oscillatory flow through a bifurcating airway model. American Society of Mechanical Engineers, Bioengineering Division (Publication) BED. editor / M.C. Boyce. Vol. 31 New York, NY, United States : ASME, 1995. pp. 211-212
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