An experimental and numerical study on flagellar spiral motion

Naoki Ono; Hirotaka Fukushima; Yusuke Inui

doi:10.1299/kikaib.76.771_1862

An experimental and numerical study on flagellar spiral motion

Naoki Ono, Hirotaka Fukushima, Yusuke Inui

Research output: Contribution to journal › Article › peer-review

Abstract

Microbes can move smoothly in water environment with high efficiency, which could offer innovative ideas for micro hydro machines in future. In this study, we investigated the spiral movement of flagellum by using numerical and exerimental models. We simulated a microbe's fluid environment of Re number of 10^-4. The model study revealed that the maximum values of driving force and fluid velocity appeared depending on the model's roll number and spiral diameter. The occurrence of the maximum was explained by the two competing factors, which were the increase in longitudinal velocity and the decrease of spiral wave velocity as the roll number increased.

Original language	English
Pages (from-to)	1862-1869
Number of pages	8
Journal	Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume	76
Issue number	771
DOIs	https://doi.org/10.1299/kikaib.76.771_1862
Publication status	Published - 2010 Nov

Keywords

CFD
Euglena
Flagellum
Reynolds number
Scaling law
Spiral motion

ASJC Scopus subject areas

Condensed Matter Physics
Mechanical Engineering

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10.1299/kikaib.76.771_1862

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AU - Ono, Naoki

AU - Fukushima, Hirotaka

AU - Inui, Yusuke

PY - 2010/11

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N2 - Microbes can move smoothly in water environment with high efficiency, which could offer innovative ideas for micro hydro machines in future. In this study, we investigated the spiral movement of flagellum by using numerical and exerimental models. We simulated a microbe's fluid environment of Re number of 10-4. The model study revealed that the maximum values of driving force and fluid velocity appeared depending on the model's roll number and spiral diameter. The occurrence of the maximum was explained by the two competing factors, which were the increase in longitudinal velocity and the decrease of spiral wave velocity as the roll number increased.

AB - Microbes can move smoothly in water environment with high efficiency, which could offer innovative ideas for micro hydro machines in future. In this study, we investigated the spiral movement of flagellum by using numerical and exerimental models. We simulated a microbe's fluid environment of Re number of 10-4. The model study revealed that the maximum values of driving force and fluid velocity appeared depending on the model's roll number and spiral diameter. The occurrence of the maximum was explained by the two competing factors, which were the increase in longitudinal velocity and the decrease of spiral wave velocity as the roll number increased.

KW - CFD

KW - Euglena

KW - Flagellum

KW - Reynolds number

KW - Scaling law

KW - Spiral motion

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An experimental and numerical study on flagellar spiral motion

Abstract

Keywords

ASJC Scopus subject areas

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