Effect of intertmittency on axial dispersion in an asymmetrical oscillatory flow

Hideki Fujioka*, Kazuo Tanishita


研究成果: Conference contribution


The axial dispersion in oscillatory flow is one of the important factors influencing the gas transport during HFO. Recently, requirement for HFO is increasingly diversified. The mucus clearance is one of important thing for HFO. And it was proved that the difference flow rate between inspiration and expiration oscillation was effective for mucus clearance. According to our latest study, the dispersion in an oscillatory flow can be improved by introducing the stationary period right after the diffusing particle experiences the largest movement because of its lateral mixing effect during the stationary period. In this study the numerical simulation on the gas transport in asymmetrical oscillatory laminar flow in a straight circular pipe was carried out for improvement of gas transport. The presence of stationary period enhances the axial gas transport in an asymmetrical oscillatory flow and maximum ratio of effective diffusivity to the molecular diffusivity doubles than that of sinusoidal oscillatory flow.

ホスト出版物のタイトルAmerican Society of Mechanical Engineers, Bioengineering Division (Publication) BED
編集者John M. Tarbell
Place of PublicationNew York, NY, United States
出版社Publ by ASME
出版ステータスPublished - 1993
イベントProceedings of the 1993 ASME Winter Annual Meeting - New Orleans, LA, USA
継続期間: 1993 11月 281993 12月 3


OtherProceedings of the 1993 ASME Winter Annual Meeting
CityNew Orleans, LA, USA

ASJC Scopus subject areas

  • 工学(全般)


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