Effect of turbulence on the Taylor dispersion in oscillatory flow

Masahiro Nishida, Hideki Fujioka, Takehiko Kowatari, Kazuo Tanishita

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

2 Citations (Scopus)

Abstract

The effective use of high frequency oscillation (HFO) requires the precise knowledge of Taylor dispersion of gas on the oscillatory flow. In the present study, axial gas transport and turbulent characteristics was measured on the oscillatory flow at and near resonance frequency, in straight circular pipe being simulated for the trachea. The velocity profiles were measured by hot wire anemometer. Effective dispersion coefficient was determined by the measurement of carbon dioxide concentration which was dispersed from the injection point. The turbulence appeared at the frequency near the resonance and turbulent intensity and kurtosis achieved the maximum values in the beginning of deceleration phase. Furthermore, the integral scale was enlarged and lateral mixing of carbon dioxide was enhanced by the large turbulent diffusion coefficient.

Original languageEnglish
Title of host publicationAmerican Society of Mechanical Engineers, Bioengineering Division (Publication) BED
Place of PublicationNew York, NY, United States
PublisherPubl by ASME
Pages211-214
Number of pages4
Volume22
ISBN (Print)0791811166
Publication statusPublished - 1992
Externally publishedYes
EventWinter Annual Meeting of the American Society of Mechanical Engineers - Anaheim, CA, USA
Duration: 1992 Nov 81992 Nov 13

Other

OtherWinter Annual Meeting of the American Society of Mechanical Engineers
CityAnaheim, CA, USA
Period92/11/892/11/13

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Nishida, M., Fujioka, H., Kowatari, T., & Tanishita, K. (1992). Effect of turbulence on the Taylor dispersion in oscillatory flow. In American Society of Mechanical Engineers, Bioengineering Division (Publication) BED (Vol. 22, pp. 211-214). Publ by ASME.